Ubirajara Van Kolck

Interests

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Courses

Scholarly Contributions

Books

• Hjorth-Jensen, M., Lombardo, M. P., & van Kolck, U. (2017). An Advanced Course in Computational Nuclear Physics: Bridging the scales from quarks to neutron stars. Cham: Springer.
• van Kolck, U., Bedaque, P. F., Savage, M. J., & Seki, R. (1999). Nuclear Physics with Effective Field Theory II. World Scientific.
• van Kolck, U., Seki, R., & Savage, M. J. (1998). Nuclear Physics with Effective Field Theory. World Scientific.

Chapters

• van Kolck, U. (2020). Effective Field Theories for Nuclear and (some) Atomic Physics. In Effective Field Theory in Particle Physics and Cosmology(pp 362-414). Oxford University Press. doi:10.1093/oso/9780198855743.003.0006
• Hjorth-Jensen, M., Lombardo, M. P., & van Kolck, U. (2017). Motivation and Overarching Aims. In An Advanced Course in Computational Nuclear Physics: Bridging the scales from quarks to neutron stars(pp 1--4). Cham: Springer.
• van Kolck, U. (2014). Effective Field Theories of Loosely Bound Nuclei. In The Euroschool on Exotic Beams vol. 4, Lect. Notes Phys. 879(pp 123-182).
• van Kolck, U. (1999). Overview. In Nuclear Physics with Effective Field Theory II(pp 1-16). World Scientific, Singapore.
• van Kolck, U. (1998). Overview. In Nuclear Physics with Effective Field Theory(pp 1-14). World Scientific, Singapore.
• van Kolck, U. (1995). Effective Chiral Theory of Nuclear Forces. In Low Energy Effective Theories and QCD.

Journals/Publications

• Contessi, L., Schaefer, M., & van Kolck, U. (2024). Improved Action for Contact Effective Field Theory. Phys. Rev. A, 109, 022814. doi:10.1103/PhysRevA.109.022814
• Griesshammer, H., & van Kolck, U. (2023). Universality of Three Identical Bosons with Large, Negative Effective Range. Eur. Phys. J. A, 59, 289. doi:10.1140/epja/s10050-023-01196-0
• Odell, D., Phillips, D. R., & van Kolck, U. (2023). Effective Field Theory for the Bound States and Scattering of a Heavy Charged Particle and a Neutral Atom. Phys. Rev. A, 108, 062817. doi:10.1103/PhysRevA.108.062817
• Yang, C., Ekstrom, A., Forssen, C., Hagen, G., Rupak, G., & van Kolck, U. (2023). The importance of few-nucleon forces in chiral effective field theory. Eur. Phys. J. A, 59, 233. doi:10.1140/epja/s10050-023-01149-7
• Zhou, D., Long, B., Timmermans, R. G., & van Kolck, U. (2022). Renormalization of One-Pion Exchange in Chiral Effective Field Theory for Antinucleon-Nucleon Scattering. Phys. Rev. C, 105, 054005. doi:10.1103/PhysRevC.105.054005
• van Kolck, U. (2022). Weinberg's Compositeness. Symmetry, 14, 1884. doi:10.3390/sym14091884
• van Kolck, U., & al., e. (2022). Nuclear Forces for Precision Nuclear Physics: A Collection of Perspectives. Few-Body Syst., 63, 67. doi:10.1007/s00601-022-01749-x
• Habashi, J. B., Fleming, S., & van Kolck, U. (2021). Nonrelativistic Effective Field Theory with a Resonance Field. Eur. J. Phys. A, 57, 169.
• Oosterhof, F., de Vries, J., Timmermans, R. G., & van Kolck, U. (2021). Nucleon decay in the deuteron. Phys. Lett. B, 820, 136525.
• van Kolck, U. (2021). Nuclear Effective Field Theories: Reverberations of the Early Days. Few-Body Syst., 62, 85.
• Dawkins, W. G., Carlson, J., van Kolck, U., & Gezerlis, A. (2020). Clustering of Four-Component Unitary Fermions. Phys. Rev. Lett., 124, 143402. doi:10.1103/PhysRevLett.124.143402
• Habashi, J. B., Sen, S., Fleming, S., & van Kolck, U. (2020). Effective Field Theory for Two-Body Systems with Shallow S-Wave Resonances. Annals Phys., 422, 168283. doi:10.1016/j.aop.2020.168283
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  Resonances are of particular importance to the scattering of compositeparticles in quantum mechanics. We build an effective field theory for two-bodyscattering which includes a low-energy $S$-wave resonance. Our starting pointis the most general Lagrangian with short-range interactions. We demonstratethat these interactions can be organized into various orders so as to generatea systematic expansion for an $S$ matrix with two low-energy poles. The polepositions are restricted by renormalization at leading order, where the commonfeature is a non-positive effective range. We carry out the expansionexplicitly to next-to-leading order and illustrate how it systematicallyaccounts for the results of a toy model -- a spherical well with a delta shellat its border.[Journal_ref: Annals Phys. 422 (2020) 168283]
• Koenig, S., Hammer, H., & van Kolck, U. (2020). Nuclear Effective Field Theory: Status and perspectives. Rev. Mod. Phys., 92, 025004. doi:10.1103/RevModPhys.92.025004
• Ryberg, E., Forssen, C., Phillips, D. R., & van Kolck, U. (2020). Finite-Size Effects in Heavy Halo Nuclei from Effective Field Theory. Eur. Phys. J. A, 56, 7. doi:doi:10.1140/epja/s10050-019-00001-1
• van Kolck, U. (2020). Naturalness in Nuclear Effective Field Theories. Eur. Phys. J. A, 56, 97. doi:10.1140/epja/s10050-020-00092-1
• van Kolck, U. (2020). The Problem of Renormalization of Chiral Nuclear Forces. Frontiers, 8, 79. doi:10.3389/fphy.2020.00079
• Bazak, B., Kirscher, J., Koenig, S., Pavon Valderrama, M., Barnea, N., & van Kolck, U. (2019). Four-Body Scale in Universal Few-Boson Systems. Phys. Rev. Lett., 122, 143001. doi:doi:10.1103/PhysRevLett.122.143001
• Cirigliano, V., Dekens, W., de Vries, J., Graesser, M. L., Mereghetti, E., Pastore, S., Piarulli, M., Wiringa, R. B., & van Kolck, U. (2019). Renormalized Approach to Neutrinoless Double-Beta Decay. Phys. Rev. C, 100, 055504. doi:doi:10.1103/PhysRevC.100.055504
• Oosterhof, F., Long, B., de Vries, J., Timmermans, R. G., & van Kolck, U. (2019). Baryon-Number Violation by Two Units and the Deuteron Lifetime. Phys. Rev. Lett., 122, 172501. doi:doi:10.1103/PhysRevLett.122.172501
• Rupak, G., Vaghani, A., Higa, R., & van Kolck, U. (2019). Fate of the Neutron-Deuteron Virtual State as an Efimov Level. Phys. Lett. B, 791, 414-419. doi:doi.org/10.1016/j.physletb.2018.08.051
• Song, Y., Lazauskas, R., & van Kolck, U. (2019). Erratum: Triton Binding Energy and Neutron-Deuteron Scattering up to Next-to-Leading Order in Chiral Effective Field Theory. Phys. Rev. C, 100, 019901(E).
• Cirigliano, V., Dekens, W., de Vries, J., Graesser, M. L., Mereghetti, E., Pastore, S., & van Kolck, U. (2018). New Leading Contribution to Neutrinoless Double-Beta Decay. Phys. Rev. Lett., 120, 202001.
• Sanchez Sanchez, M., Yang, C., Long, B., & van Kolck, U. (2018). Two-Nucleon 1S0 Amplitude Zero in Chiral Effective Field Theory. Phys. Rev. C, 97, 024001.
• Carlson, J., Gandolfi, S., van Kolck, U., & Vitiello, S. A. (2017). Ground-State Properties of Unitary Bosons: From clusters to matter. Phys. Rev. Lett., 119, 223002.
• Contessi, L., Lovato, A., Pederiva, F., Roggero, A., Kirscher, J., & van Kolck, U. (2017). Ground-State Properties of 4He and 16O Extrapolated from Lattice QCD with Pionless EFT. Phys. Lett. B, 772, 839-848.
• Koenig, S., Griesshammer, H. W., Hammer, H., & van Kolck, U. (2017). Nuclear Physics Around the Unitarity Limit. Phys. Rev. Lett., 118, 202501.
• Pavon Valderrama, M., Sanchez Sanchez, M., Yang, C., Long, B., Carbonell, J., & van Kolck, U. (2017). Power Counting in Peripheral Partial Waves: The singlet channels. Phys. Rev. C, 95, 054001.
• Song, Y., Lazauskas, R., & van Kolck, U. (2017). Triton Binding Energy and Neutron-Deuteron Scattering up to Next-to-Leading Order in Chiral Effective Field Theory. Phys. Rev. C, 96, 024002.
• Yang, C., Grasso, M., Moghrabi, K., & van Kolck, U. (2017). Renormalizability of the Nuclear Many-Body Problem with the Skyrme Interaction Beyond Mean Field. Phys. Rev. C, 95, 054325.
• van Kolck, U. (2017). Unitarity and Discrete Scale Invariance. Few-Body Syst., 58, 112-123.
• Bazak, B., Eliyahu, M., & van Kolck, U. (2016). Effective Field Theory for Few-Boson Systems. Phys. Rev. A, 94, 052502.
• Grasso, M., Lacroix, D., & van Kolck, U. (2016). From Effective Field Theories to Effective Density Functionals In and Beyond the Mean Field. Phys. Scripta, 91, 063005.
• Koenig, S., Griesshammer, H. W., Hammer, H., & van Kolck, U. (2016). Effective Theory of 3H and 3He. J. Phys. G, 43, 055106.
• Pavon Valderrama, M., & van Kolck, U. (2016). Preface. Int. J. Mod. Phys. E, 25, 1602001.
• van Kolck, U. (2015). Few-Nucleon Systems in a Quirky World: Lattice nuclei in effective field theory. Few-Body Syst., 56, 745-752.
• van Kolck, U., & Mereghetti, E. (2015). Effective Field Theory and Time-Reversal Violation in Light Nuclei. Ann. Rev. Nucl. Part. Sci., 65, 215-243.
• van Kolck, U., Barnea, N., Contessi, L., Gazit, D., & Pederiva, F. (2015). Effective Field Theory for Lattice Nuclei. Phys. Rev. Lett., 114, 052501.
• van Kolck, U., Kirscher, J., Barnea, N., Gazit, D., & Pederiva, F. (2015). Spectrum and Scattering of Light Lattice Nuclei from Effective Field Theory. Phys. Rev. C, 92, 054002.
• Engel, J., Ramsey-Musolf, M. J., & van Kolck, U. (2013). Electric dipole moments of nucleons, nuclei, and atoms: The Standard Model and beyond. Prog. Part. Nucl. Phys., 71, 21-74.
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  Abstract: Searches for the permanent electric dipole moments (EDMs) of molecules, atoms, nucleons and nuclei provide powerful probes of CP violation both within the Standard Model and beyond the Standard Model (BSM). The interpretation of experimental EDM limits requires careful delineation of physics at a wide range of scales, from the long-range atomic and molecular scales to the short-distance dynamics of physics at or beyond the Fermi scale. In this review, we provide a framework for disentangling contributions from physics at these disparate scales, building out from the set of dimension four and six effective operators that embody CP violation at the Fermi scale. We survey computations of hadronic and nuclear matrix elements associated with Fermi-scale CP violation in systems of experimental interest and quantify the present level of theoretical uncertainty in these calculations. Using representative BSM scenarios of current interest, we discuss ways in which the interplay of physics at various scales can generate EDMs at a potentially observable level. © 2013 Elsevier B.V. All rights reserved.
• Mereghetti, E., de Vries, J., Timmermans, R. G., & van Kolck, U. (2013). Toroidal quadrupole form factor of the deuteron. Physical Review C - Nuclear Physics, 88(3), 034001.
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  Abstract: We calculate the toroidal quadrupole moment and form factor of the deuteron, which violate time-reversal symmetry but conserve parity, at leading order in two-flavor chiral effective field theory with perturbative pion exchange. We take into account time-reversal and parity violation owing to the QCD vacuum angle combined with parity violation resulting from the weak interaction in the Standard Model. We also consider time-reversal and parity violation that at the quark-gluon level results from effective dimension-six operators originating from physics beyond the Standard Model. © 2013 American Physical Society.
• Rotureau, J., & van Kolck, U. (2013). Effective Field Theory and the Gamow Shell Model: The ⁶He Halo Nucleus. Few-Body Systems, 54(5-6), 725-735.
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  Abstract: We combine halo/cluster effective field theory (H/CEFT) and the Gamow shell model (GSM) to describe the 0+ ground state of 6He as a three-body halo system. We use two-body interactions for the neutron-alpha particle and two-neutron pairs obtained from H/CEFT at leading order, with parameters determined from scattering in the p3/2 and s0 channels, respectively. The three-body dynamics of the system is solved using the GSM formalism, where the continuum states are incorporated in the shell model valence space. We find that in the absence of three-body forces the system collapses, since the binding energy of the ground state diverges as cutoffs are increased. We show that addition at leading order of a three-body force with a single parameter is sufficient for proper renormalization and to fix the binding energy to its experimental value. © 2012 Springer-Verlag.
• de Vries, J., Mereghetti, E., Timmermans, R. G., & van Kolck, U. (2013). The effective chiral Lagrangian from dimension-six parity and time-reversal violation. Annals of Physics, 338, 50-96.
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  Abstract: We classify the parity- and time-reversal-violating operators involving quark and gluon fields that have effective dimension six: the quark electric dipole moment, the quark and gluon chromo-electric dipole moments, and four four-quark operators. We construct the effective chiral Lagrangian with hadronic and electromagnetic interactions that originate from them, which serves as the basis for calculations of low-energy observables. The form of the effective interactions depends on the chiral properties of these operators. We develop a power-counting scheme and calculate within this scheme, as an example, the parity- and time-reversal-violating pion-nucleon form factor. We also discuss the electric dipole moments of the nucleon and light nuclei. © 2013 Elsevier Inc.
• Coon, S. A., Avetian, M. I., Kruse, M. K., van Kolck, U., Maris, P., & Vary, J. P. (2012). Convergence properties of ab initio calculations of light nuclei in a harmonic oscillator basis. Physical Review C - Nuclear Physics, 86(5), 054002.
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  Abstract: We study recently proposed ultraviolet and infrared momentum regulators of the model spaces formed by construction of a variational trial wave function which uses a complete set of many-body basis states based upon three-dimensional harmonic oscillator (HO) functions. These model spaces are defined by a truncation of the expansion characterized by a counting number (N) and by the intrinsic scale (a) of the HO basis-in short by the ordered pair (N,). In this study we choose for N the truncation parameter Nmax related to the maximum number of oscillator quanta, above the minimum configuration, kept in the model space. The uv momentum cutoff of the continuum is readily mapped onto a defined uv cutoff in this finite model space, but there are two proposed definitions of the ir momentum cutoff inherent in a finite-dimensional HO basis. One definition is based upon the lowest momentum difference given by itself and the other upon the infrared momentum which corresponds to the maximal radial extent used to encompass the many-body system in coordinate space. Extending both the uv cutoff to infinity and the ir cutoff to zero is prescribed for a converged calculation. We calculate the ground-state energy of light nuclei with bare and soft nucleon-nucleon (NN) interactions. By doing so, we investigate the behaviors of the uv and ir regulators of model spaces used to describe 2H, 3H, 4He, and 6He with NN potentials Idaho N3LO and JISP16. We establish practical procedures which utilize these regulators to obtain the extrapolated result from sequences of calculations with model spaces characterized by (N). © 2012 American Physical Society.
• Liu, C. -., de Vries, J., Mereghetti, E., Timmermans, R. G., & van Kolck, U. (2012). Deuteron magnetic quadrupole moment from chiral effective field theory. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 713(4-5), 447-452.
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  Abstract: We calculate the magnetic quadrupole moment (MQM) of the deuteron at leading order in the systematic expansion provided by chiral effective field theory. We take into account parity (P) and time-reversal (T) violation which, at the quark-gluon level, results from the QCD vacuum angle and dimension-six operators that originate from physics beyond the Standard Model. We show that the deuteron MQM can be expressed in terms of five low-energy constants that appear in the P- and T-violating nuclear potential and electromagnetic current, four of which also contribute to the electric dipole moments of light nuclei. We conclude that the deuteron MQM has an enhanced sensitivity to the QCD vacuum angle and that its measurement would be complementary to the proposed measurements of light-nuclear EDMs. © 2012 Elsevier B.V..
• van Kolck, U., Rotureau, J., Barrett, B. R., & Stetcu, I. (2012). Two and Three Nucleons in a Trap and the Continuum Limit. Phys. Rev. C, 85, 034003.
• Long, B., & van Kolck, U. (2011). The role of the Roper in chiral perturbation theory. Nuclear Physics A, 870-871(1), 72-82.
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  Abstract: We include the Roper excitation of the nucleon in a version of heavy-baryon chiral perturbation theory recently developed for energies around the delta resonance. We find significant improvement in the P11 channel. © 2011 Elsevier B.V.
• Maekawa, C. M., Mereghetti, E., de Vries, J., & van Kolck, U. (2011). The time-reversal- and parity-violating nuclear potential in chiral effective theory. Nuclear Physics A, 872(1), 117-160.
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  Abstract: We derive the parity- and time-reversal-violating nuclear interactions stemming from the QCD θ̄ term and quark/gluon operators of effective dimension 6: quark electric dipole moments, quark and gluon chromo-electric dipole moments, and two four-quark operators. We work in the framework of two-flavor chiral perturbation theory, where a systematic expansion is possible. The different chiral-transformation properties of the sources of time-reversal violation lead to different hadronic interactions. For all sources considered the leading-order potential involves known one-pion exchange, but its specific form and the relative importance of short-range interactions depend on the source. For the θ̄ term, the leading potential is solely given by one-pion exchange, which does not contribute to the deuteron electric dipole moment. In subleading order, a new two-pion-exchange potential is obtained. Its short-range component is indistinguishable from one of two undetermined contact interactions that appear at the same order and represent effects of heavier mesons and other short-range QCD dynamics. One-pion-exchange corrections at this order are discussed as well. © 2011.
• Mereghetti, E., de Vries, J., Hockings, W. H., Maekawa, C. M., & van Kolck, U. (2011). The electric dipole form factor of the nucleon in chiral perturbation theory to sub-leading order. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 696(1-2), 97-102.
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  Abstract: The electric dipole form factor (EDFF) of the nucleon stemming from the QCD θ̄ term and from the quark color-electric dipole moments is calculated in chiral perturbation theory to sub-leading order. This is the lowest order in which the isoscalar EDFF receives a calculable, non-analytic contribution from the pion cloud. In the case of the θ̄ term, the expected lower bound on the deuteron electric dipole moment is |dd|≳1.4. 10-4θ̄e fm. The momentum dependence of the isovector EDFF is proportional to a non-derivative time-reversal-violating pion-nucleon coupling, and the scale for momentum variation-appearing, in particular, in the radius of the form factor-is the pion mass. © 2010 Elsevier B.V.
• de Vries, J., Higa, R., Liu, C. -., Mereghetti, E., Stetcu, I., Timmermans, R. G., & van Kolck, U. (2011). Electric dipole moments of light nuclei from chiral effective field theory. Physical Review C - Nuclear Physics, 84(6), 065501.
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  Abstract: We set up the framework for the calculation of electric dipole moments (EDMs) of light nuclei using the systematic expansion provided by chiral effective field theory (EFT). We take into account parity (P) and time-reversal (T) violation which, at the quark-gluon level, originates from the QCD vacuum angle and dimension-six operators capturing physics beyond the standard model. We argue that EDMs of light nuclei can be expressed in terms of six low-energy constants that appear in the P- and T-violating nuclear potential and electric current. As examples, we calculate the EDMs of the deuteron, the triton, and 3He in leading order in the EFT expansion. © 2011 American Physical Society.
• de Vries, J., Mereghetti, E., Timmermans, R. G., & van Kolck, U. (2011). P and T violating form factors of the deuteron. Physical Review Letters, 107(9), 091804.
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  PMID: 21929227;Abstract: We calculate the electric-dipole and magnetic-quadrupole form factors of the deuteron that arise as a low-energy manifestation of parity and time-reversal violation in quark-gluon interactions. We consider the QCD vacuum angle and the dimension-six operators that originate from physics beyond the standard model: the quark electric and chromoelectric dipole moments and the gluon chromoelectric dipole moment. Within the framework of two-flavor chiral perturbation theory, we show that in combination with the nucleon electric dipole moment, the deuteron moments would allow an identification of the dominant source(s) of symmetry violation. © 2011 American Physical Society.
• de Vries, J., Mereghetti, E., Timmermans, R. G., & van Kolck, U. (2011). The nucleon electric dipole form factor from dimension-six time-reversal violation. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 695(1-4), 268-274.
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  Abstract: We calculate the electric dipole form factor of the nucleon that arises as a low-energy manifestation of time-reversal violation in quark-gluon interactions of effective dimension 6: the quark electric and chromoelectric dipole moments, and the gluon chromoelectric dipole moment. We use the framework of two-flavor chiral perturbation theory to one loop. © 2010 Elsevier B.V.
• Long, B., & van Kolck, U. (2010). πN scattering in the Δ(1232) region in an effective field theory. Nuclear Physics A, 840(1-4), 39-75.
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  Abstract: We develop a generalized version of heavy-baryon chiral perturbation theory to describe pion-nucleon scattering in a kinematic domain that extends continuously from threshold to the delta-isobar peak. The P-wave phase shifts are used to illustrate this framework. We also compare our approach with those in the literature that concern the delta resonance. © 2010 Elsevier B.V.
• Mereghetti, E., Hockings, W. H., & van Kolck, U. (2010). The effective chiral Lagrangian from the theta term. Annals of Physics, 325(11), 2363-2409.
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  Abstract: We construct the effective chiral Lagrangian involving hadronic and electromagnetic interactions originating from the QCD θ̄ term. We impose vacuum alignment at both quark and hadronic levels, including field redefinitions to eliminate pion tadpoles. We show that leading time-reversal-violating (TV) hadronic interactions are related to isospin-violating interactions that can in principle be determined from charge-symmetry-breaking experiments. We discuss the complications that arise from TV electromagnetic interactions. Some implications of the expected sizes of various pion-nucleon TV interactions are presented, and the pion-nucleon form factor is used as an example. © 2010.
• van Kolck, U., Rotureau, J., Stetcu, I., Barrett, B. R., & Birse, M. C. (2010). Three and Four Harmonically Trapped Particles in an Effective Field Theory Framework. Phys. Rev. A, 82, 032711.
• van Kolck, U., Stetcu, I., Rotureau, J., & Barrett, B. R. (2010). An Effective Field Theory Approach to Two Trapped Particles. Ann. Phys., 325, 1644-166.
• van Kolck, U., Stetcu, I., Rotureau, J., & Barrett, B. R. (2010). Effective Interactions for Light Nuclei: An effective (field theory) approach. J. Phys. G, 37, 064033.
• Higa, R., Hammer, H. -., & van Kolck, U. (2008). αα scattering in halo effective field theory. Nuclear Physics A, 809(3-4), 171-188.
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  Abstract: We study the two-alpha-particle (αα) system in an Effective Field Theory (EFT) for halo-like systems. We propose a power counting that incorporates the subtle interplay of strong and electromagnetic forces leading to a narrow resonance at an energy of about 0.1 MeV. We investigate the EFT expansion in detail, and compare its results with existing low-energy αα phase shifts and previously determined effective-range parameters. Good description of the data is obtained with a surprising amount of fine-tuning. This scenario can be viewed as an expansion around the limit where, when electromagnetic interactions are turned off, the 8Be ground state is at threshold and exhibits conformal invariance. We also discuss possible extensions to systems with more than two alpha particles. © 2008 Elsevier B.V.
• Long, B., & van Kolck, U. (2008). Renormalization of singular potentials and power counting. Annals of Physics, 323(6), 1304-1323.
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  Abstract: We use a toy model to illustrate how to build effective theories for singular potentials. We consider a central attractive 1 / r2 potential perturbed by a 1 / r4 correction. The power-counting rule, an important ingredient of effective theory, is established by seeking the minimum set of short-range counterterms that renormalize the scattering amplitude. We show that leading-order counterterms are needed in all partial waves where the potential overcomes the centrifugal barrier, and that the additional counterterms at next-to-leading order are the ones expected on the basis of dimensional analysis. © 2008 Elsevier Inc. All rights reserved.
• Stetcu, I., Barrett, B. R., van Kolck, U., & Vary, J. P. (2008). Erratum: Effective theory for trapped few-fermion systems (Physical Review A (2007) 76 (063613)). Physical Review A - Atomic, Molecular, and Optical Physics, 77, 039902.
• Fleming, S., Kusunoki, M., Mehen, T., & van Kolck, U. (2007). Pion interactions in the X(3872). Physical Review D - Particles, Fields, Gravitation and Cosmology, 76(3).
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  Abstract: We consider pion interactions in an effective field theory of the narrow resonance X(3872), assuming it is a weakly bound molecule of the charm mesons D0D̄*0 and D*0D̄0. Since the hyperfine splitting of the D0 and D*0 is only 7 MeV greater than the neutral pion mass, pions can be produced near threshold and are nonrelativistic. We show that pion exchange can be treated in perturbation theory and calculate the next-to-leading-order correction to the partial decay width Γ[X→D0D̄0π0]. © 2007 The American Physical Society.
• van Kolck, U., Stetcu, I., & Barrett, B. R. (2007). No-Core Shell Model in an Effective-Field-Theory Framework. Phys. Lett. B, 653, 358-362.
• van Kolck, U., Stetcu, I., Barrett, B. R., & Vary, J. P. (2007). Effective Theory for Trapped Few-Fermion Systems. Phys. Rev. A, 76, 063613.
• Nogga, A., Fonseca, A. C., Gårdestig, A., Hanhart, C., Horowitz, C. J., Miller, G. A., Niskanen, J. A., & van Kolck, U. (2006). Realistic few-body physics in the d d → α π⁰ reaction. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 639(5), 465-470.
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  Abstract: We use realistic two- and three-nucleon interactions in a hybrid chiral-perturbation-theory calculation of the charge-symmetry-breaking reaction d d → α π0 to show that a cross section of the experimentally measured size can be obtained using LO and NNLO pion-production operators. This result supports the validity of our power counting scheme and demonstrates the necessity of using an accurate treatment of ISI and FSI. It also becomes evident that a full calculation requires the use of consistent chiral nuclear forces to overcome the visible model dependence of our result. © 2006 Elsevier B.V. All rights reserved.
• Seki, R., & van Kolck, U. (2006). Effective field theory of nucleon-nucleon scattering on large discrete lattices. Physical Review C - Nuclear Physics, 73(4).
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  Abstract: Nuclear effective field theory is applied to the effective-range expansion of S-wave nucleon-nucleon scattering on a discrete lattice. Lattice regularization is demonstrated to yield the effective-range expansion in the same way as in the usual continuous open space. The relation between the effective-range parameters and the potential parameters is presented in the limit of a large lattice. © 2006 The American Physical Society.
• Beane, S. R., & van Kolck, U. (2005). The role of the Roper in QCD. Journal of Physics G: Nuclear and Particle Physics, 31(8), 921-933.
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  Abstract: We show that existing data suggest a simple scenario in which the nucleon and the Δ and Roper resonances act as chiral partners in a reducible representation of the full QCD chiral symmetry group. We discuss the peculiar interpretation of this scenario using spin-flavour symmetries of the naive constituent quark model, as well as the consistency of the scenario with large-Nc expectations. © 2005 IOP Publishing Ltd.
• Beane, S. R., Malheiro, M., McGovern, J. A., Phillips, D. R., & van Kolck, U. (2005). Compton scattering on the proton, neutron, and deuteron in chiral perturbation theory to O (Q⁴). Nuclear Physics A, 747(2-4), 311-361.
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  Abstract: We study Compton scattering in systems with A = 1 and 2 using chiral perturbation theory up to fourth order. For the proton we fit the two undetermined parameters in the O(Q4) γp amplitude of McGovern to experimental data in the region ω, t ≤ 180 MeV, obtaining a χ2 /d.o.f. of 133/113. This yields a model-independent extraction of proton polarizabilities based solely on low-energy data: αp = (12.1 ± 1.1 (stat.)) -0.5+0.5 (theory) and βp = (3.4 ± 1.1 (stat.))-0.1+0.1 (theory), both in units of 10-4 fm3. We also compute Compton scattering on deuterium to O(Q4). The γd amplitude is a sum of one- and two-nucleon mechanisms, and contains two undetermined parameters, which are related to the isoscalar nucleon polarizabilities. We fit data points from three recent γd scattering experiments with a χ2 /d.o.f. = 26.6/20, and find αN = (13.0 ± 1.9 (stat.))-1.5+3.9 (theory) and a βN that is consistent with zero within sizable error bars. © 2004 Elsevier B.V. All rights reserved.
• Beane, S. R., Malheiro, M., McGovern, J. A., Phillips, D. R., & van Kolck, U. (2005). Erratum: Nucleon polarizabilities from low-energy Compton scattering (Physics Letters B (2003) 567 (200) DOI: 10.1016/j.physletb.2003.06.040). Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 607(3-4), 320-322.
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  Abstract: The results given for the isoscalar combinations of nucleon electromagnetic polarizabilities in [Phys. Lett. B 567 (2003) 200] are incorrect. After correcting errors in our O(Q4) chiral perturbation theory calculation of elastic γd scattering we obtain a fit to recent experimental data with χ2/d.o.f.=26.6/20. For the isoscalar electric polarizability this fit yields αN=(13.0±1.9(stat))-1.5+3.9(theory), while βN is consistent with zero within sizable error bars. These mistakes in our γd calculation do not affect the results quoted in [Phys. Lett. B 567 (2003) 200] for the proton polarizabilities. © 2003 Elsevier B.V. All rights reserved.
• Hockings, W. H., & van Kolck, U. (2005). The electric dipole form factor of the nucleon. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 605(3-4), 273-278.
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  Abstract: The electric dipole form factor of the nucleon stemming from the QCD θ term is calculated in chiral perturbation theory in leading order. To this order, the form factor originates from the pion cloud. Its momentum-dependence is proportional to a non-derivative time-reversal-violating pion-nucleon coupling, and the scale for momentum variation - appearing, in particular, in the radius of the form factor - is the pion mass. © 2004 Elsevier B.V. All rights reserved.
• Nogga, A., Timmermans, R. G., & van Kolck, U. (2005). Renormalization of one-pion exchange and power counting. Physical Review C - Nuclear Physics, 72(5).
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  Abstract: The renormalization of the chiral nuclear interactions is studied. In leading order, the cutoff dependence is related to the singular tensor interaction of the one-pion exchange potential. In S waves and in higher partial waves where the tensor force is repulsive this cutoff dependence can be absorbed by counterterms expected at that order. In the other partial waves additional contact interactions are necessary. The implications of this finding for the effective field theory program in nuclear physics are discussed. © 2005 The American Physical Society.
• Pandharipande, V. R., Phillips, D. R., & van Kolck, U. (2005). Δ effects in pion-nucleon scattering and the strength of the two-pion-exchange three-nucleon interaction. Physical Review C - Nuclear Physics, 71(6).
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  Abstract: We consider the relationship between p-wave πN scattering and the strength of the p-wave two-pion-exchange three-nucleon interaction (TPE3NI). We explain why effective theories that do not contain the Delta resonance as an explicit degree of freedom tend to overestimate the strength of the TPE3NI. The overestimation can be remedied by higher-order terms in these "Delta-less" theories, but such terms are not yet included in state-of-the-art chiral effective field theory calculations of the nuclear force. This suggests that these calculations can predict the strength of the TPE3NI only to an accuracy of ±25%. © 2005 The American Physical Society.
• Zhu, S., Maekawa, C. M., Holstein, B. R., Ramsey-Musolf, M., & van Kolck, U. (2005). Nuclear parity violation in effective field theory. Nuclear Physics A, 748(3-4), 435-498.
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  Abstract: We reformulate the analysis of nuclear parity violation (PV) within the framework of effective field theory (EFT). To O (Q), the PV nucleon-nucleon (NN) interaction depends on five a priori unknown constants that parameterize the leading-order, short-range four-nucleon operators. When pions are included as explicit degrees of freedom, the potential contains additional medium- and long-range components parameterized by PV π N N coupling. We derive the form of the corresponding one- and two-pion-exchange potentials. We apply these considerations to a set of existing and prospective PV few-body measurements that may be used to determine the five independent low-energy constants relevant to the pionless EFT and the additional constants associated with dynamical pions. We also discuss the relationship between the conventional meson-exchange framework and the EFT formulation, and argue that the latter provides a more general and systematic basis for analyzing nuclear PV. © 2004 Elsevier B.V. All rights reserved.
• van Kolck, U., Payne, G. L., & Friar, J. L. (2005). Charge-symmetry-breaking three-nucleon forces. Physical Review C - Nuclear Physics, 71(2).
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  Abstract: Leading-order three-nucleon forces that violate isospin symmetry are calculated in heavy-baryon chiral perturbation theory. The effect of the charge-symmetry-breaking three-nucleon force is investigated in the trinucleon systems using Faddeev calculations. We find that the contribution of this force to the 3He- 3H binding-energy difference is given by ΔE 3NFCSB ≃ 5 keV. ©2005 The American Physical Society.
• Cohen, T. D., Gelman, B. A., & van Kolck, U. (2004). An effective field theory for coupled-channel scattering. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 588(1-2), 57-66.
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  Abstract: The problem of describing low-energy two-body scattering for systems with two open channels with different thresholds is addressed in the context of an effective field theory. In particular, the problem where the threshold is unnaturally small and the cross section at low energy is unnaturally large is considered. It is shown that the lowest-order point coupling associated with the mixing of the channels scales as Λ-2 rather than Λ-1 (the scaling of the same-channel coupling and the scaling in a single-channel case) where Λ is the ultraviolet cutoff. The renormalization of the theory at lowest order is given explicitly. The treatment of higher orders is straightforward. The potential implications for systems with deep open channels are discussed. © 2004 Elsevier B.V. All rights reserved.
• Friar, J. L., van Kolck, U., Rentmeester, M. C., & Timmermans, R. G. (2004). Nucleon-mass difference in chiral perturbation theory and nuclear forces. Physical Review C - Nuclear Physics, 70(4), 044001-1.
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  Abstract: A method is developed for treating the effect of the neutron-proton mass difference in isospin-violating nuclear forces. Previous treatments utilized an awkward subtraction scheme to generate these forces. A field redefinition is used to remove that mass difference from the free Lagrangian (and hence from asymptotic nucleon states) and replace its effect by effective interactions. Previous calculations of static class II charge-independence-breaking and class III charge-symmetry-breaking potentials are verified using the new scheme, which is also used to calculate class IV nuclear forces. Two-body forces of the latter type are found to be identical to previously obtained results. A three-body force is also found. Problems involving Galilean invariance with class IV one-pion-exchange forces are identified and resolved.
• Gårdestig, A., Horowitz, C. J., Nogga, A., Fonseca, A. C., Hanhart, C., Miller, G. A., Niskanen, J. A., & van Kolck, U. (2004). Survey of charge symmetry breaking operators for dd → απ ⁰. Physical Review C - Nuclear Physics, 69(4), 044606-1-044606-16.
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  Abstract: The charge symmetry breaking amplitudes for the recently observed dd → απ 0 reaction are investigated. Chiral perturbation theory is used to classify and identify the leading-order terms. Specific forms of the related one- and two-body tree-level diagrams are derived. As a first step toward a full calculation, a few tree-level two-body diagrams are evaluated at each considered order, using a simplified set of d and α wave functions and a plane-wave approximation for the initial dd state. The leading-order pion-exchange term is shown to be suppressed in this model because of poor overlap of the initial and final states. The higher-order one-body and short-range (heavy-meson-exchange) amplitudes provide better matching between the initial and final states and therefore contribute significantly and coherently to the cross section. The consequences this might have for a full calculation, with realistic wave functions and a more complete set of amplitudes, are discussed.
• Beane, S. R., Malheiro, M., McGovern, J. A., Phillips, D. R., & van Kolck, U. (2003). Nucleon polarizabilities from low-energy Compton scattering. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 567(3-4), 200-206.
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  Abstract: An effective field theory is used to give a model-independent description of Compton scattering at energies comparable to the pion mass. The amplitudes for scattering on the proton and the deuteron, calculated to fourth order in small momenta in chiral perturbation theory, contain four undetermined parameters that are in one-to-one correspondence with the nucleon polarizabilities. These polarizabilities are extracted from fits to data on elastic photon scattering on hydrogen and deuterium. For the proton we find: αp = (12.1 ± 1.1)-0.5+0.5 × 10-4 fm3, βp= (3.4 ± 1.1) -0.1+0.1 × 10-4 fm3. For the isoscalar polarizabilities we obtain: αN = (9.0 ± 1.5)-0.8+3.6 × 10-4 fm3, βN = (1.7 ± 1.5)-0.6+1.4 × 10-4 fm3. © 2003 Published by Elsevier B.V.
• Bedaque, P. F., Hammer, H. -., & van Kolck, U. (2003). Narrow resonances in effective field theory. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 569(3-4), 159-167.
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  Abstract: We discuss the power counting for effective field theories with narrow resonances near a two-body threshold. Close to threshold, the effective field theory is perturbative and only one combination of coupling constants is fine-tuned. In the vicinity of the resonance, a second, "kinematic" fine-tuning requires a nonperturbative resummation. We illustrate our results in the case of nucleon-alpha scattering. © 2003 Elsevier B.V. All rights reserved.
• Friar, J. L., van Kolck, U., Payne, G. L., & Coon, S. A. (2003). Charge-symmetry breaking and the two-pion-exchange two-nucleon interaction. Physical Review C - Nuclear Physics, 68(2), 240031-240037.
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  Abstract: Charge-symmetry breaking in the nucleon-nucleon force is investigated within an effective field theory, using a classification of isospin-violating interactions based on power-counting arguments. The relevant charge-symmetry-breaking interactions corresponding to the first two orders in the power counting are discussed, including their effects on the 3He-3H binding-energy difference. The static charge-symmetry-breaking potential linear in the nucleon-mass difference is constructed using chiral perturbation theory. Explicit formulas in momentum and configuration spaces are presented. The present work completes previously obtained results.
• Miller, G. A., & van Kolck, U. (2003). Big break for charge symmetry. Physics World, 16(6), 19-20.
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  Abstract: The experiments detecting the aspects of charge symmetry breaking were reported. The masses of protons and neutrons were calculated using quantum chromodynamics (QCD) and electromagnetism. The difference between the up and down quarks in neutrons and protons resulted in the production of neutral-pions. In regard with the breaking of charge symmetry, the interactions of pions with protons and neutrons and the relation of spin angular momentum of fundamental particles is discussed.
• Stephenson, E. J., Bacher, A. D., Allgower, C. E., Gårdestig, A., Lavelle, C. M., Miller, G. A., Nann, H., Olmsted, J., Pancella, P. V., Pickar, M. A., Rapaport, J., Rinckel, T., Smith, A., Spinka, H. M., & van Kolck, U. (2003). Observation of the charge symmetry breaking d + d → ⁴He + π⁰ reaction near threshold. Physical Review Letters, 91(14), 142302/1-142302/4.
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  Abstract: The first unambiguous measurement of the d+d→4He+π0 cross section as well as that for the competing double radiative capture process was carried out. Preliminary plane wave calculations indicate that π0-η mixing is important. Furthermore, estimates showed that electromagnetic effects are very small.
• Beane, S. R., Bedaque, P. F., Savage, M. J., & van Kolck, U. (2002). Towards a perturbative theory of nuclear forces. Nuclear Physics A, 700(1-2), 377-402.
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  Abstract: We show that an expansion of nuclear forces about the chiral limit is formally consistent and is equivalent to KSW power counting in the 1S0 channel and Weinberg power counting in the 3S1-3D1 coupled channels. Numerical evidence suggests that this expansion converges. The feasibility of making contact between nuclear physics and lattice-QCD simulations is discussed. © 2002 Published by Elsevier Science B.V.
• Bedaque, P. F., & van Kolck, U. (2002). Effective field theory for few-nucleon systems. Annual Review of Nuclear and Particle Science, 52, 339-396.
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  Abstract: We review the effective field theories (EFTs) developed for few-nucleon systems. These EFTs are controlled expansions in momenta, where certain (leading-order) interactions are summed to all orders. At low energies, an EFT with only contact interactions allows a detailed analysis of renormalization in a nonperturbative context and uncovers novel asymptotic behavior. Manifestly model-independent calculations can be carried out to high orders, leading to high precision. At higher energies, an EFT that includes pion fields justifies and extends the traditional framework of phenomenological potentials. The correct treatment of QCD symmetries ensures a connection with lattice QCD. Several tests and prospects of these EFTs are discussed.
• Bertulani, C. A., Hammer, H. -., & van Kolck, U. (2002). Effective field theory for halo nuclei: Shallow p-wave states. Nuclear Physics A, 712(1-2), 37-58.
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  Abstract: Halo nuclei are a promising new arena for studies based on effective field theory (EFT). We develop an EFT for shallow p-wave states and discuss the application to elastic nα scattering. In contrast to the s-wave case, both the scattering length and effective range enter at leading order. We also discuss the prospects of using EFT in the description of other halos, such as the three-body halo nucleus 6He. © 2002 Elsevier Science B.V. All rights reserved.
• Beane, S. R., Bedaque, P. F., Childress, L., Kryjevski, A., McGuire, J., & van Kolck, U. (2001). Singular potentials and limit cycles. Physical Review A. Atomic, Molecular, and Optical Physics, 64(4), 421031-421038.
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  Abstract: Singular potentials of the form 1/rn with n≥2 were studied in terms of renormalization theory. It was shown that the well-known pathologies near the origin were cured by a square-well counterterm that represented the effect of unknown short-distance physics. The renormalization-group evolution of this counterterm was found to have a periodic behavior. Singular potentials appeared to have a nonanalytical dependence on the coupling parameter even at weak coupling.
• Diaconescu, L., Schiavilla, R., & van Kolck, U. (2001). Parity-violating electron-deuteron scattering. Physical Review C - Nuclear Physics, 63(4), 440071-4400711.
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  Abstract: The longitudinal asymmetry due to Z0 exchange is calculated in quasielastic electron-deuteron scattering at momentum transfers |Q2|≃0.1 GeV2 relevant for the SAMPLE experiment. The deuteron and pn-scattering-state wave functions are obtained from solutions of a Schrödinger equation with the Argonne υ 18 potential. Electromagnetic and weak neutral one- and two-nucleon currents are included in the calculation. The two-nucleon currents of pion range are shown to be identical to those derived in chiral perturbation theory. The results indicate that two-body contributions to the asymmetry are small (≃0.2%) around the quasielastic peak, but become relatively more significant (≃3%) in the high-energy wing of the quasielastic peak.
• Hanhart, C., Miller, G. A., Myhrer, F., Sato, T., & van Kolck, U. (2001). Toy model for pion production in nucleon-nucleon collisions. Physical Review C - Nuclear Physics, 63(4), 440021-440027.
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  Abstract: We develop a toy model for pion production in nucleon-nucleon collisions that reproduces some of the features of the chiral Lagrangian calculations. We calculate the production amplitude and examine some common approximations.
• Hüber, D., Friar, J. L., Nogga, A., Witała, H., & van Kolck, U. (2001). Novel three-nucleon-force terms in the three-nucleon system. Few-Body Systems, 30(1-2), 95-120.
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  Abstract: We include two specific three-nucleon-force terms of pion-range-short-range form in our momentum-space calculations for the three-nucleon continuum. These two terms are expected by chiral perturbation theory to be non-negligible. We study the effects of these terms in elastic neutron-deuteron scattering and pay special attention to the neutron vector-analyzing power Ay.
• A., C., Miller, G. A., & van Kolck, U. (2000). NN→NN_π⁺ reaction near threshold in a chiral power counting approach. Physical Review C - Nuclear Physics, 61(3), 346131-3461312.
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  Abstract: Power-counting arguments are used to organize the interactions contributing to the NN→dπ,pnπ reactions near threshold. We estimate the contributions from the three formally leading mechanisms: the Weinberg-Tomozawa (WT) term, the impulse term, and the Δ-excitation mechanism. Subleading but potentially large mechanisms, including S-wave pion rescattering, the Galilean correction to the WT term, and short-ranged contributions are also examined. The WT term is shown to be numerically the largest, and the other contributions are found to approximately cancel. Similarly to the reaction pp→ppπ0, the computed cross sections are considerably smaller than the data. We discuss possible origins of this discrepancy.
• Bedaque, P. F., Hammer, H. -., & van Kolck, U. (2000). Effective theory of the triton. Nuclear Physics A, 676(1-4), 357-370.
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  Abstract: We apply the effective field theory approach to the three-nucleon system. In particular, we consider S = 1/2 neutron-deuteron scattering and the triton. We show that in this channel a unique nonperturbative renormalization takes place which requires the introduction of a single three-body force at leading order. With one fitted parameter we find a good description of low-energy data. Invariance under the renormalization group explains some universal features of the three-nucleon system - such as the Thomas and Efimov effects and the Phillips line - and the origin of SU(4) symmetry in nuclei. © 2000 Elsevier Science B.V. All rights reserved.
• Hanhart, C., van Kolck, U., & Miller, G. A. (2000). Chiral three-nucleon forces from p-wave pion production. Physical Review Letters, 85(14), 2905-2908.
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  PMID: 11005964;Abstract: The production of p-wave pions in nucleon-nucleon (NN) scattering is demonstrated. It is shown that the data on this reaction can be used to extract information about the three-nucleon force.
• Maekawa, C. M., Veiga, J. S., & van Kolck, U. (2000). The nucleon anapole form factor in chiral perturbation theory to sub-leading order. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 488(2), 167-174.
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  Abstract: The anapole form factor of the nucleon is calculated in chiral perturbation theory to sub-leading order. This is the lowest order in which the isovector anapole form factor does not vanish. The anapole moment depends on counterterms that reflect short-range dynamics, but the momentum dependence of the form factor is determined by pion loops in terms of parameters that could in principle be fixed from other processes. If these parameters are assumed to have natural size, the sub-leading corrections do not exceed ~ 30% at momentum Q ~ 300 MeV. (C) 2000 Published by Elsevier Science B.V.
• Müller, H., Koonin, S. E., Seki, R., & van Kolck, U. (2000). Nuclear matter on a lattice. Physical Review C - Nuclear Physics, 61(4), 443201-4432011.
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  Abstract: We investigate nuclear matter on a cubic lattice. An exact thermal formalism is applied to nucleons with a Hamiltonian that accommodates on-site and next-neighbor parts of the central, spin-, and isospin-exchange interactions. We describe the nuclear matter Monte Carlo methods which contain elements from shell model Monte Carlo methods and from numerical simulations of the Hubbard model. We show that energy and basic saturation properties of nuclear matter can be reproduced. Evidence of a first-order phase transition from an uncorrelated Fermi gas to a clustered system is observed by computing mechanical and thermodynamical quantities such as compressibility, heat capacity, entropy, and grand potential. We compare symmetry energy and first sound velocities with literature and find reasonable agreement.
• van Kolck, U., & Maekawa, C. M. (2000). The Anapole Form Factor of the Nucleon. Phys. Lett. B, 478, 73-78.
• van Kolck, U., Niskanen, J. A., & Miller, G. A. (2000). Charge symmetry violation in pn → dπ⁰ and chiral effective field theory. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 493(1-2), 65-72.
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  Abstract: Chiral effective field theory predicts a specific charge symmetry violating amplitude for pion production. This term is shown to provide a potentially large contribution to the forward-backward asymmetry in the angular distribution for the reaction pn → dπ0. (C) 2000 Elsevier Science B.V.
• Beane, S. R., Malheiro, M., Phillips, D. R., & van Kolck, U. (1999). Compton scattering on the deuteron in baryon chiral perturbation theory. Nuclear Physics A, 656(3-4), 367-399.
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  Abstract: Compton scattering on the deuteron is studied in the framework of baryon chiral perturbation theory to third order in small momenta, for photon energies of order the pion mass. The scattering amplitude is a sum of one- and two-nucleon mechanisms with no undetermined parameters. Our results are in good agreement with existing experimental data, and a prediction is made for higher-energy data being analyzed at SAL. © 1999 Elsevier Science B.V. All rights reserved.
• Bedaque, P. F., Hammer, H. -., & van Kolck, U. (1999). Renormalization of the Three-Body System with Short-Range Interactions. Physical Review Letters, 82(3), 463-467.
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  Abstract: We discuss renormalization of the nonrelativistic three-body problem with short-range forces. The problem becomes nonperturbative at momenta of the order of the inverse of the two-body scattering length, and an infinite number of graphs must be summed. This summation leads to a cutoff dependence that does not appear in any order in perturbation theory. We argue that this cutoff dependence can be absorbed in a single three-body counterterm and compute the running of the three-body force with the cutoff. We comment on the relevance of this result for the effective field theory program in nuclear and molecular physics.
• Bedaque, P. F., Hammer, H. -., & van Kolck, U. (1999). The three-boson system with short-range interactions. Nuclear Physics A, 646(4), 444-466.
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  Abstract: We discuss renormalization of the non-relativistic three-body problem with short-range forces. The problem is non-perturbative at momenta of the order of the inverse of the two-body scattering length. An infinite number of graphs must be summed, which leads to a cutoff dependence that does not appear in any order in perturbation theory. We argue that this cutoff dependence can be absorbed in one local three-body force counterterm and compute the running of the three-body force with the cutoff. This allows a calculation of the scattering of a particle and the two-particle bound state if the corresponding scattering length is used as input. We also obtain a model-independent relation between binding energy of a shallow three-body bound state and this scattering length. We comment on the power counting that organizes higher-order corrections and on relevance of this result for the effective field theory program in nuclear and molecular physics. © 1999 Elsevier Science B.V.
• Friar, J. L., & van Kolck, U. (1999). Charge-independence breaking in the two-pion-exchange nucleon-nucleon force. Physical Review C - Nuclear Physics, 60(3), 340061-340064.
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  Abstract: Charge-independence breaking due to the pion-mass difference in the (chiral) two-pion-exchange nucleon-nucleon force is investigated. A general argument based on symmetries is presented that relates the charge-symmetric part of that force to the proton-proton case. The static potential linear in that mass difference is worked out as an explicit example by means of Feynman diagrams, and this confirms the general argument.
• Friar, J. L., Hüber, D., & van Kolck, U. (1999). Chiral symmetry and three-nucleon forces. Physical Review C - Nuclear Physics, 59(1), 53-58.
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  Abstract: After a brief review of the role three-nucleon forces play in the few-nucleon systems, the chiral-perturbation-theory approach to these forces is discussed. Construction of the (nominal) leading-and subleading-order Born terms and pion-rescattering graphs contributing to two-pion-exchange three-nucleon forces is reviewed, and comparisons are made of the types of such forces that are used today. It is demonstrated that the short-range c term of the Tucson-Melbourne force is unnatural in terms of power counting and should be dropped. The class of two-pion-exchange three-nucleon forces then becomes rather uniform.
• van Kolck, U. (1999). Effective field theory of nuclear forces. Progress in Particle and Nuclear Physics, 43(1), 337-418.
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  Abstract: The application of the effective field theory (EFT) method to nuclear systems is reviewed. The roles of degrees of freedom, QCD symmetries, power counting, renormalization, and potentials are discussed. EFTs are constructed for the various energy regimes of relevance in nuclear physics, and are used in systematic expansions to derive nuclear forces in terms of a number of parameters that embody information about QCD dynamics. Two-, three-, and many-nucleon systems, including external probes, are considered.
• van Kolck, U. (1999). Effective field theory of short-range forces. Nuclear Physics A, 645(2), 273-302.
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  Abstract: The method of effective field theories (EFTs) is developed for the scattering of two particles at wavelengths which are large compared to the range of their interaction. It is shown that the renormalized EFT is equivalent to the effective range expansion, to a Schrödinger equation with a pseudo-potential, and to an energy expansion of a generic boundary condition at the origin. The roles of regulators and potentials are also discussed. © 1999 Elsevier Science B.V.
• Bedaque, P. F., & van Kolck, U. (1998). Nucleon-deuteron scattering from an effective field theory. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 428(3-4), 221-226.
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  Abstract: We use an effective field theory to compute low-energy nucleon-deuteron scattering. We obtain the quartet scattering length using low energy constants entirely determined from low-energy nucleon-nucleon scattering. We find ath = 6.33 fm, to be compared to aexp = 6.35 ± 0.02 fm. © 1998 Published by Elsevier Science B.V. All rights reserved.
• Bedaque, P. F., Hammer, H. -., & van Kolck, U. (1998). Effective theory for neutron-deuteron scattering: Energy dependence. Physical Review C - Nuclear Physics, 58(2), R641-R644.
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  Abstract: We report on results of the effective theory method applied to neutron-deuteron scattering. We extend previous results in the J = 3/2 channel to nonzero energies and find very good agreement with the experiment without any parameter fitting.
• van Kolck, U., Rentmeester, M. C., Friar, J. L., Goldman, T., & Swart, J. D. (1998). Electromagnetic corrections to the one-pion-exchange potential. Physical Review Letters, 80(20), 4386-4389.
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  Abstract: Leading-order electromagnetic loop corrections to the one-pion-exchange potential are computed within the framework of chiral perturbation theory. These corrections generate an effective nucleon-nucleon potential, Vπγ, which supplements the sum of one-pion-exchange potential and the nucleon-nucleon Coulomb potential. This potential is charge dependent and its construction is demonstrated to be gauge invariant. The potential Vπγ has been included in the Nijmegen partial-wave analysis of n p data. A particular renormalization scheme is chosen that leads to a negligible change in the π±NN coupling constant and in the n p 1S0 scattering length and effective range.
• Beane, S. R., Bernard, V., Lee, T. -., Meißner, U., & van Kolck, U. (1997). Neutral pion photoproduction on deuterium in baryon chiral perturbation theory to order q⁴. Nuclear Physics A, 618(4), 381-401.
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  Abstract: Threshold neutral pion photoproduction on the deuteron is studied in the framework of baryon chiral perturbation theory beyond next-to-leading order in the chiral expansion. To fourth order in small momenta, the amplitude is finite and a sum of two-and three-body interactions with no undetermined parameters. With accurate theoretical and experimental input from the single nucleon sector for the proton amplitude, we investigate the sensitivity of the threshold cross section to the elementary γn → π0n amplitude. A precise measurement of the threshold cross section for γd → π0d is called for. © 1997 Elsevier Science B.V.
• Cohen, T. D., Friar, J. L., Miller, G. A., & van Kolck, U. (1996). pp→ppπ⁰ reaction near threshold: A chiral power counting approach. Physical Review C - Nuclear Physics, 53(6), 2661-2673.
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  Abstract: We use power-counting arguments as an organizing principle to apply chiral perturbation theory, including an explicit Δ, to the pp → pp π0 reaction near threshold. There are two lowest-order leading mechanisms expected to contribute to the amplitude with similar magnitudes: an impulse term, and a Δ-excitation mechanism. We examine formally subleading but potentially large mechanisms, including pion-rescattering and short-ranged contributions. We show that the pion-rescattering contribution is enhanced by off-shell effects and has a sign opposite to that of a recent estimate based on a PCAC pion interpolating field. Our result is that the impulse term interferes destructively with the pion-rescattering and Δ-excitation terms. In addition, we have modeled the short-ranged interaction using σ and ω exchange mechanisms. A recoil correction to the impulse approximation is small. The total amplitude obtained including all of these processes is found to yield cross sections substantially smaller than the measured ones.
• Ordóñez, C., Ray, L., & van Kolck, U. (1996). Two-nucleon potential from chiral Lagrangians. Physical Review C - Nuclear Physics, 53(5), 2086-2105.
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  Abstract: Chiral symmetry is consistently implemented in the two-nucleon problem at low-energy through the general effective chiral Lagrangian. The potential is obtained up to a certain order in chiral perturbation theory both in momentum and coordinate space. Results of a fit to scattering phase shifts and bound state data are presented, where satisfactory agreement is found for laboratory energies up to about 100 MeV.
• van Kolck, U., Friar, J. L., & Goldman, T. (1996). Phenomenological aspects of isospin violation in the nuclear force. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 371(3-4), 169-174.
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  Abstract: Phenomenological Lagrangians and dimensional power counting are used to assess isospin violation in the nucleon-nucleon force. The πNN coupling constants (including the Goldberger-Treiman discrepancy), charge-symmetry breaking, and meson-mixing models are examined. A one-loop analysis of the isospin-violating πNN coupling constants is performed using chiral perturbation theory. Meson-mixing models and the 3He-3H mass difference are also discussed in the context of naturalness.
• van Kolck, U., Miller, G. A., & Riska, D. O. (1996). Meson exchange and pion rescattering contributions to the cross section for pp → ppπ⁰. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 388(4), 679-685.
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  Abstract: Short range meson-exchange mechanisms such as p → ωπ0 contribute significantly to the amplitude for pp → ppπ0 near threshold in addition to pion rescattering. The uncertainty of the latter contribution, which depends on poorly determined parameters, is estimated. Allowing for this uncertainty and taking the short range meson exchange contributions into account makes it possible to reproduce the measured cross section.
• Beane, S. R., Lee, C. Y., & van Kolck, U. (1995). Neutral pion photoproduction on nuclei in baryon chiral perturbation theory. Physical Review C, 52(6), 2914-2924.
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  Abstract: Threshold neutral pion photoproduction on light nuclei is studied in the framework of baryon chiral perturbation theory. We obtain a general formula for the electric dipole amplitude in the special case of neutral pion photoproduction on a nucleus. To third order in small momenta, the amplitude is a sum of 2- and 3-body interactions with no undetermined parameters. With reasonable input from the single nucleon sector, our result for neutral pion photoproduction on the deuteron is in agreement with experiment. © 1995 The American Physical Society.
• Beane, S. R., & van Kolck, U. (1994). The dilated chiral quark model. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 328(1-2), 137-142.
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  Abstract: It is argued that constituent quarks live in an effective theory that possesses an approximate conformal invariance. An effective lagrangian is constructed which in the large-Nc approximation incorporates Regge asymptotic constraints. The resulting picture explains why linear-sigma models provide successful constituent quark descriptions, both at zero and finite temperature. Our analysis suggests an interesting relation between non-linearly realized conformal invariance and the completion of chiral multiplets in the broken symmetry phase.
• Ordóñez, C., Ray, L., & van Kolck, U. (1994). Nucleon-nucleon potential from an effective chiral lagrangian. Physical Review Letters, 72(13), 1982-1985.
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  Abstract: The nucleon-nucleon potential obtained from the most general effective chiral Lagrangian involving low momentum pions, nonrelativistic nucleons, and Δ isobars was considered to third order in the chiral expansion. The parameters of the potential were adjusted to reproduce the low energy nucleon-nucleon scattering phase shifts as well as the properties of the deuteron. Reasonable fits are obtained in this first application of a nucleon-nucleon potential based on chiral symmetry.
• van Kolck, U. (1994). Few-nucleon forces from chiral Lagrangians. Physical Review C, 49(6), 2932-2941.
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  Abstract: Few-nucleon forces are considered from the point of view of effective chiral Lagrangians. It is argued that such forces naturally arise at the same order in chiral perturbation theory as some important features of the two-nucleon force. In particular, the leading few-nucleon forces cancel against the leading recoil correction in the iteration of the two-body potential. The remaining three-body potential is presented in momentum and coordinate spaces. It is dominated by contributions of the delta isobar of (i) two-pion range, which are not new, and (ii) shorter range, which involve an undetermined parameter. © 1994 The American Physical Society.
• Dicus, D. A., Minic, D., van Kolck, U., & Vega, R. (1992). The axial vector coupling and magnetic moment of the quark. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 284(3-4), 384-389.
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  Abstract: Details of an estimate of the corrections of order I/N to the axial vector coupling of the constituent quark, where N is the number of colors, are presented. Analogous estimate is made for the magnetic moment of the constituent quark.
• Ordóñez, C., & van Kolck, U. (1992). Chiral lagrangians and nuclear forces. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 291(4), 459-464.
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  Abstract: We obtain the nuclear potential coming from the general chiral invariant effective lagrangian up to third order. It consists of a stronger two-body potential and a weaker three-body force. It accounts for the known spin-isospin dependence in the form of contact terms but also yields novel features of finite range.
• van Kolck, U., & Foong, S. K. (1992). Poisson Random Walk for Solving Wave Equations. Prog. Theor. Phys., 87, 285-292.
• van Kolck, U. L., & Pimentel, B. M. (1988). Comments on Stochastic Quantization and Regularization of Gauge Theories. Can. J. Phys., 66, 700-707.

Proceedings Publications

• van Kolck, U. (2023). Lepton- and Baryon-Number Violation in Nuclear Effective Field Theory. In J. Phys.: Conf. Ser., 2453, 012014.
• van Kolck, U. (2022). Weinberg and Few-Nucleon Forces. In J. Phys.: Conf. Ser., 2340, 012027.
• van Kolck, U., & al., e. (2022, December). FSNN Theory Workforce LRP 2022. In Long-Range Plan Town Hall on Fundamental Symmetries, Neutrons, and Neutrinos.
• van Kolck, U., & al., e. (2022, March). Neutrinoless Double-Beta Decay: A roadmap for matching theory to experiment. In US Community Study on the Future of Particle Physics - Snowmass 2021.
• van Kolck, U. (2019, Spring 2019). Nuclear Physics with an Effective Field Theory Around the Unitarity Limit. In Nuovo Cim. C, 42, 52.
• van Kolck, U. (2018, Spring 2018). Nuclear Physics From an Expansion Around the Unitarity Limit. In J. Phys.: Conf. Series, 966.
• van Kolck, U. (2014, Fall). Time-Reversal Violation in the Nucleon and Light Nuclei. In EPJ Web Conf., 73, 01011.
• van Kolck, U. (2012, January). Time-reversal violation in the nucleon and the nucleus. In Proceedings of Science.
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  Abstract: I describe the formalism for the calculation of nucleon and nuclear parity- and time-reversal-violating form factors stemming from operators of dimension up to six in the Standard Model Lagrangian I argue that proposed measurements of light nuclear electric dipole moments would give valuable information about the source of time-reversal violation. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.
• van Kolck, U. (2010, January). X(3872): The hidden charm of nuclear physics. In AIP Conf. Proc., 1296, 189-194.
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  Abstract: I discuss an effective field theory, X-EFT, for the X(3872), a state very close to the D0D̄*0 threshold just as the deuteron is close to the proton-neutron threshold. I use a field for the X (3872) assuming its quantum numbers to be JPC=1++. Pions are kept explicit in X-EFT together with D and D̄*, because pion exchange is relatively long-ranged due to a partial cancellation between the D*-D mass splitting and the pion mass. Pion exchange is amenable to perturbation theory. I illustrate X-EFT with a calculation up to next-to-leading order of the partial decay width of the X, assumed to be below the D 0D̄*0 threshold, into D0D̄ 0π0. © 2010 American Institute of Physics.
• van Kolck, U. (2008, January). Nuclear physics from QCD. In 8th Conference Quark Confinement and the Hadron Spectrum.
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  Abstract: Effective field theories provide a bridge between QCD and nuclear physics. I discuss light nuclei from this perspective, emphasizing the role of fine-tuning.
• van Kolck, U. (2007). Nuclear Effective Field Theories. In Opportunities with Exotic Beams, 219--230.
• van Kolck, U. (2007, January). Chiral nuclear effective field theory. In AIP Conference Proceedings, 884, 3-12.
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  Abstract: New results regarding the renormalization of pion exchange and power counting in chiral nuclear effective field theory are discussed. © 2007 American Institute of Physics.
• van Kolck, U. (2007, January). Power counting in nuclear chiral effective field theory. In Chiral Dynamics 2006 - Proceedings of the 5th International Workshop on Chiral Dynamics, Theory and Experiment, CD 2006, 330-331.
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  Abstract: The renormalization of singular potentials leads to a new power counting in nuclear chiral effective field theory.
• van Kolck, U. (2007, June). Nuclear effective field theory with pions. In Nuclear Physics A, 790, 39-45.
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  Abstract: The renormalization of singular potentials is presented, and its implications to pion exchange and power counting in chiral nuclear effective field theory are discussed. © 2007 Elsevier B.V. All rights reserved.
• van Kolck, U. (2007, May). Nuclear Effective Field Theory Without Pions. In Nuclear Physics A, 787, 405-414.
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  Abstract: Effective field theories without explicit pion fields have been developed for the description of weakly-bound nuclei. I review continuum results for systems with up to four nucleons, a novel no-core-shell-model-basis calculation of larger systems, and the extension to halo nuclei. © 2006 Elsevier B.V. All rights reserved.
• van Kolck, U. (2005). Charge-Symmetry-Breaking Nuclear Forces. In Effective Field Theories in Nuclear, Particle and Atomic Physics.
• van Kolck, U. (2005, April). Effective field theories of light nuclei. In Nuclear Physics A, 752, 145c-154c.
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  Abstract: Effective field theories have been developed for the description of light, shallow nuclei. I review results for two- and three-nucleon systems, and discuss their extension to halo nuclei. © 2005 Elsevier B.V. All rights reserved.
• van Kolck, U. (2005, August). Effective field theories for weakly bound nuclei. In Journal of Physics G: Nuclear and Particle Physics, 31, S1245-S1252.
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  Abstract: Effective field theories have been developed for the description of weakly bound nuclei. I review results for two- and three-nucleon systems, and discuss their extension to halo nuclei. © 2005 IOP Publishing Ltd.
• van Kolck, U. (2005, February). Halo effective field theory. In International Journal of Modern Physics E, 14, 11-19.
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  Abstract: I discuss effective field theories for bound states and narrow resonances near two-body thresholds. I illustrate the method in the case of nucleon-alpha scattering. © World Scientific Publishing Company.
• Maekawa, C. M., da Veiga, J. S., & van Kolck, U. (2003). Electroweak Form Factor of the Nucleon. In 23rd Brazilian National Meeting on Particle and Fields.
• van Kolck, U. (2003). Charge Symmetry Breaking in Few-Nucleon Systems. In Proc. RBRC Work., 53, 355.
• van Kolck, U. (2003). Charge Symmetry Breaking in Pion Production. In Fourth International Workshop on Chiral Dynamics: Theory and Experiment.
• van Kolck, U. (2002). Introduction to Effective Field Theories in QCD. In AIP Conference Proceedings, 631, 191-220.
• van Kolck, U. (2002). One Two Three ... Infinity: Nucleons in EFT. In Effective Field Theories of QCD.
• van Kolck, U. (2002). Recent Progress in Nuclear Effective Field Theory. In Proc. RBRC Work., 49, 153.
• van Kolck, U. (2002, February). Recent developments in nuclear effective field theory. In Nuclear Physics A, 699, 33c-40c.
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  Abstract:Two recent developments in the application of Effective Field Theory to nuclear physics are reviewed. The power counting in the two-nucleon system is clarified, and the role of novel three-nucleon forces is discussed.
• Kolck, U. V. (2001). Effective field theories for strongly interacting systems. In Nuclear Physics A, 17c-24c.
• Schiavilla, R., van Kolck, U., & Weller, H. R. (2001). Summary of the Working Group on Few--Body Physics. In Chiral Dynamics: Theory and Experiment III, 401-427.
• van Kolck, U. (2001). Nuclear Effective Field Theory. In Proc. RBRC Work., 38, 509.
• van Kolck, U. (2001). Nuclear Forces in EFT. In Chiral Dynamics: Theory and Experiment III, 430-431.
• van Kolck, U., Malheiro, M., Beane, S. R., & Phillips, D. R. (2001). Deuteron Compton Scattering in Chiral Perturbation Theory. In Hadron Physics 2000, 38, 285-288.
• van Kolck, U. (2000). Effective Field Theory of Nuclei. In Proc. RBRC Work., 30, 239.
• van Kolck, U. (1999). Light Nuclei in Light of Chiral Perturbation Theory'. In Workshop on Electron Nucleus Scattering.
• van Kolck, U. (1999). Near-Threshold Pion (Photo)Production: a Success and an Opportunity. In Nuclear Physics with Effective Field Theory II, 198-224.
• van Kolck, U. (1998). Nucleon-Nucleon Interaction and Isospin Violation. In Lect. Notes Phys., 513, 62-77.
• van Kolck, U. (1998). The Aleph. In Nuclear Physics with Effective Field Theory, 79-101.
• van Kolck, U. (1998, March). Chiral perturbation theory in few-body systems. In Nuclear Physics A, 631, 56c-69c.
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  Abstract: An effective hadronic field theory provides a framework to carry out systematic and consistent calculations of low-energy strong interaction processes. Its fundamental ingredient is chiral symmetry, which ensures a perturbative expansion of the nuclear potential in loops and many-nucleon effects. The two-nucleon potential to a certain order in this expansion provides a good fit to deuteron properties and to phase shifts up to 100 MeV laboratory energies. A consistent three-nucleon potential can also be obtained. Isospin violation from the quark mass difference and electromagnetism is shown to obey an observed hierarchy. Processes involving external probes - pion-deuteron scattering, protonneutron radiative capture, pion photoproduction on the deuteron, and pion production in proton-proton collisions - are also discussed in the same framework.
• van Kolck, U., da Rocha, C. A., & Miller, G. A. (1998). Study of the Reaction p+p -> d+pi+ According to Chiral Perturbation Theory. In 20th Brazilian Meeting on Nuclear Physics.
• van Kolck, U. (1997). Chiral Perturbation Theory in Few-Nucleon Systems. In AIP Conf. Proc., 110-124.
• van Kolck, U. (1996). Isospin Violation: pi N coupling and pi gamma exchange. In Baryons '95, 551--554.
• van Kolck, U. (1996). Isospin as an Accidental Symmetry. In The Standard Model at Low Energies.
• van Kolck, U. (1996). The Long and the Short: (Light) nuclei in QCD. In Workshop on Short-Range Structure in Nuclei.
• van Kolck, U. (1995). Chiral lagrangians and few-nucleon forces. In AIP Conference Proceedings, 334, 863.
• van Kolck, U. (1995). Isospin Violation in Low-energy Hadronic Physics. In Few-Body Syst. Suppl., 9, 444.

Presentations

• van Kolck, U. (2022, April). 'Wherever They May Lead': Effective field theories in nuclear physics (Feshbach Prize talk). 2022 April Meeting of the American Physical Society. New York: APS.
• van Kolck, U. (2022, April). Weinberg and a New Nuclear Physics. 2022 April Meeting of the American Physical Society. New York: APS.
• van Kolck, U. (2022, February/March). Lectures on Universality with Effective Field Theory. Sao Paulo School of Advanced Science on Quantum Fluids and Applications. Sao Carlos: Instituto de Fisica de Sao Carlos da Universidade de Sao Paulo.
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  Lectures.
• van Kolck, U. (2022, July). Neutrinoless Double-Beta Decay in Effective Field Theory. Seminar. online: Laboratorio Nazionale del Sud, INFN Catania.
• van Kolck, U. (2022, March). The Discrete Charm of Scale Invariance. Colloquium. Seattle: University of Washington.
• van Kolck, U. (2022, May). Bosons and Multi-Component Fermions Near Unitarity. KITP Conference on Opportunities and Challenges in Few-Body Physics: Unitarity and Beyond. Santa Barbara: Kavli Institute for Theoretical Physics.
• van Kolck, U. (2022, May). Physics Beyond the Standard Model with Nuclei. 13th International Spring Seminar on Nuclear Physics: Perspectives and Challenges in Nuclear Structure after 70 Years of Shell Model. Sant'Angelo d'Ischia.
• van Kolck, U. (2022, November). Nuclear Physics From Discrete Scale Invariance. Seminar. Washington DC: George Washington University.
• van Kolck, U. (2021, December). The Role of Few-Nucleon Forces in Chiral Effective Field Theory. Seminar. online: Los Alamos National Laboratory.
• van Kolck, U. (2020, Fall). Discrete Scale Invariance and Structure. Seminar. online: Institute for Nuclear Theory.
• van Kolck, U. (2020, Fall). The Discrete Charm of Scale Invariance in Nuclear and Atomic Physics. Colloquium. online: University of Arizona.
• van Kolck, U. (2020, January). Violation of Standard Model Symmetries in Nuclear Effective Field Theory. CERN-TH Institute on New Physics at the Low-Energy Precision Frontier. Geneva.
• van Kolck, U. (2020, Summer). The Discrete Charm of Scale Invariance in Nuclear and Atomic Physics. Colloquium. online: Instituto Tecnologico de Aeronautica.
• van Kolck, U. (2019, April). Pionless Nuclei. Workshop on Effective Field Theories and Ab Initio Calculations of Nuclei. Nanjing.
• van Kolck, U. (2019, December). A New Leading Contribution to Neutrinoless Double-Beta Decay. Seminar. Cleveland: Case Western Reserve University.
• van Kolck, U. (2019, February). Lectures on Nuclear Effective Field Theories. XIX Jorge Andre Swieca Summer School on Nuclear Physics. Campos do Jordao: Sociedade Brasileira de Fisica.
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  Lectures.
• van Kolck, U. (2019, July). Chiral EFT for Low-Energy Symmetry Tests. Workshop on Progress and Challenges in Neutrinoless Double-Beta Decay. Trento: ECT*.
• van Kolck, U. (2019, June). Bosons Near Unitarity with Effective Field Theory. Seminar. Sao Carlos: Instituto de Fisica de Sao Carlos da Universidade de Sao Paulo.
• van Kolck, U. (2019, June). From Lattice QCD to Nuclei with Effective Field Theory. Seminar. Sao Carlos: Instituto de Fisica de Sao Carlos da Universidade de Sao Paulo.
• van Kolck, U. (2019, March). A New Leading Contribution to Neutrinoless Double-Beta Decay. Seminar. Bordeaux: Centre Etudes Nucleaires de Bordeaux Gradignan.
• van Kolck, U. (2019, March). Pionless Nuclei. Joint LIA COLL-AGAIN, COPIGAL, and POLITA Workshop. University of Warsaw.
• van Kolck, U. (2019, March). The Four-Body Scale in Universal Few-Body Systems. Symposium on Nuclear Structure and Reactions: The Next Significant Breakthroughs. Caen: GANIL.
• van Kolck, U. (2019, October). A New Leading Contribution to Neutrinoless Double-Beta Decay. Seminar. Tempe: Arizona State University.
• van Kolck, U. (2019, October). Charge Form Factor of Halo Nuclei. 4th International Workshop on Quasi-Free Scattering with Radioactive-Ion Beams. Maresias.
• van Kolck, U. (2019, Spring 2019). Lectures on Introduction to Effective Field Theories in Hadronic and Nuclear Systems. Beihang University. Beijing: Beihang University.
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  Lectures.
• van Kolck, U. (2018, April). Discrete Scale Invariance in Nuclear and Atomic Systems. Workshop on Effective Field Theories and Ab Initio Methods. Chengdu: Sichuan University.
• van Kolck, U. (2018, April). Pionless ---Not Pointless!--- Effective Field Theory. Seminar. Beijing: Beihang University.
• van Kolck, U. (2018, April). The Discrete Charm of Scale Invariance in Nuclear and Atomic Physics. Colloquium. Lisbon: Instituto Superior Tecnico.
• van Kolck, U. (2018, January/February). Nucleons and Bosons at Unitarity: From few to (too?) many. Franco-Japanese Workshop on Hadron and Nuclear Physics Meet Ultracold Atoms. Paris: Institut Henri Poincare.
• van Kolck, U. (2018, July). A New Leading Mechanism for Neutrinoless Double-Beta Decay. Program on Fundamental Physics with Electroweak Probes of Light Nuclei. Seattle: Institute for Nuclear Theory.
• van Kolck, U. (2018, June). Counting Powers of What? Where?. Workshop on New Ideas in Constraining Nuclear Forces. Trento: European Centre for Theoretical Studies in Nuclear Physics and Related Areas.
• van Kolck, U. (2018, June). Meeting Summary. 1st Meeting of the LIA Subatomic Physics: From theory to applications. Sao Jose dos Campos: LIA France-Brazil on Subatomic Physics.
• van Kolck, U. (2018, June). The Discrete Charm of Scale Invariance in Nuclear and Atomic Physics. Colloquium. Sao Paulo: Universidade de Sao Paulo.
• van Kolck, U. (2018, June). The Standard Model (and Beyond) in Nuclear Physics. The Standard Model at 50 Years: a celebratory symposium. Cleveland: Case Western Reserve University.
• van Kolck, U. (2018, March). Lectures on Effective Field Theories for Nuclear and Atomic Systems. CNT Workshop on Effective Field Theory of Hadrons: Vacuum to medium. Kolkata: Variable Energy Cyclotron Centre.
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  Lectures.
• van Kolck, U. (2018, March). The Discrete Charm of Scale Invariance in Nuclear and Atomic Physics. Brahmagupta Colloquium. Chennai: Indian Institute of Technology Madras.
• van Kolck, U. (2018, March). Time-Reversal Violation in Light of Light Nuclei. Seminar. Chennai: Indian Institute of Technology Madras.
• van Kolck, U. (2018, May). Discrete Scale Invariance in Nuclear and Atomic Systems. Seminar. Sao Paulo: Universidade de Sao Paulo.
• van Kolck, U. (2018, May). The Discrete Charm of Scale Invariance in Nuclear and Atomic Physics. Colloquium. Campinas: Universidade de Campinas.
• van Kolck, U. (2018, May). Time-Reversal Violation in Light of Light Nuclei. Seminar. Orsay: Laboratoire de Physique Theorique.
• van Kolck, U. (2018, September). Lectures on Chiral Effective Field Theory. Summer School on Symmetry Breaking in Fundamental Interactions. Chiemsee: Universtaet Mainz.
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  Lectures.
• van Kolck, U. (2018, September). Nuclear Physics With an Effective Field Theory Around the Unitarity Limit. European Nuclear Physics Conference 2018. Bologna: European Physical Society.
• van Kolck, U. (2017, April). A Systematic Approach to Halo and Cluster Nuclei. Workshop on The Nucleus-Nucleus Interaction and Reactions With Exotic Nuclei. Sao Paulo: Instituto de Estudos Avancados da Universidade de Sao Paulo.
• van Kolck, U. (2017, April). Bruce's Effective Interactions. Bruce Barrett's retirement colloquium. Tucson: University of Arizona.
• van Kolck, U. (2017, January). Tower of Nuclear Effective (Field) Theories: Current status and perspectives. ESNT Workshop on The Tower of Effective (Field) Theories and the Emergence of Nuclear Phenomena. Saclay: CEA.
• van Kolck, U. (2017, July). Hommage a Cecile DeWitt-Morette. Inauguration de la nouvelle UMS Ecole de Physique des Houches. Les Houches: Ecole de Physique des Houches.
• van Kolck, U. (2017, July). Lectures on Effective Field Theory in Nuclear and Atomic Physics. Summer School on EFT in Particle Physics and Cosmology. Les Houches: Ecole de Physique des Houches.
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  Lectures.
• van Kolck, U. (2017, March). Nuclear Structure and Reactions From Lattice QCD. Program Toward Predictive Theories of Nuclear Reactions Across the Isotopic Chart. Seattle: Institute for Nuclear Theory.
• van Kolck, U. (2017, May). Nuclear Physics From an Expansion Around the Unitarity Limit. 12th International Spring Seminar on Nuclear Physics: Present prospects in nuclear structure. Sant'Angelo d'Ischia.
• van Kolck, U. (2017, October). Nuclear Physics From Discrete Scale Invariance. Workshop on Nuclear Structure and Reaction Theories: Building Together for the Future. Caen: GANIL.
• van Kolck, U. (2017, October). Unitarity and Discrete Scale Invariance. Workshop on Bridging Nuclear Ab Initio and Energy Density Functional Theories. Orsay: Institut de Physique Nucleaire Orsay.
• van Kolck, U. (2016, January). Few-Nucleon Systems: Universality and Lattice QCD. Workshop on Nuclei, Atoms, Molecules: Few-Body Problem and Beyond. Orsay: Laboratoire de Physique Theorique et Modeles Statistiques.
• van Kolck, U. (2016, January). Pionless EFT Recounted. Rapid-Reaction Task Force Workshop on The Systematic Treatment of the Coulomb Interaction in Few-Body Systems. Darmstadt: ExtreMe Matter Institute.
• van Kolck, U. (2016, January). Shedding Light on Time-Reversal Violation: from beyond the Standard Model down to nuclei. Universita di Pisa. Pisa.
• van Kolck, U. (2016, June). Nuclear Physics From the Effective Theory Point of View. Workshop on The Big Questions in Nuclear Physics. Paris: Societe Francaise de Physique.
• van Kolck, U. (2016, June). The Fabulous Features of Few-Boson Systems from Effective Field Theory. Instituto Tecnologico de Aeronautica. Sao Jose dos Campos.
• van Kolck, U. (2016, March). Effective Theory of Triton and Helion. Workshop on Future Directions for Nuclear Structure and Reaction Theories: Ab initio approaches for 2020. Caen: GANIL.
• van Kolck, U. (2016, October). Nuclear Physics Around the Unitarity Limit. Program on Frontiers in Nuclear Physics. Santa Barbara: Kavli Institute for Theoretical Physics.
• van Kolck, U. (2015, February). Nuclei in a Lattice World. Workshop on Hadrons and Hadron Interactions in QCD. Kyoto: Yukawa Institute for Theoretical Physics.
• van Kolck, U. (2015, January). Effective Theories (line through) and Fundamental Theories. Workshop on Sous-determination, incompletude, incommensurabilite: la pensee des limites. Saclay: ESNT.
• van Kolck, U. (2015, July). EFTs for $m_\pi=0\to\infty$. Workshop on Lattice Nuclei and QCD: Bridging the gap. Trento: ECT*.
• van Kolck, U. (2015, March). Light-Nuclear Structure and Reactions with Not-So-Light Quarks. Workshop on New Directions in Nuclear Structure and Reaction Theories. Caen: GANIL.
• van Kolck, U. (2015, March). Shedding Light on Time-Reversal Violation: Electric dipole moments in the Standard Model and Beyond. Institute of Physics Particle, Astroparticle and Nuclear Physics Annual Meeting. Manchester: Institute of Physics.
• van Kolck, U. (2015, October). Exposing the Limits of Time Reversal with Nuclei. University of Arizona. Tucson.
• van Kolck, U. (2015, September). Some Nuclear Physics Aspects of the Sakharov Conditions. Program on Intersections of BSM Phenomenology and QCD for New Physics Searches. Seattle: INT.
• van Kolck, U. (2014, April). Effective Field Theory for Lattice Nuclei. Program on Universality in Few-Body Systems: Theoretical challenges and new directions. Seattle, WA: INT.
• van Kolck, U. (2014, February). Halo/Cluster Effective Field Theory. Workshop on Threshold Physics at the Neutron Drip Line. Darmstadt: ExtreMe Matter Institute.
• van Kolck, U. (2014, January). Nucleon and Nuclear Electric Dipole Moments In and Beyond the Standard Model. Technische Universitaet Muenchen. Muenchen.
• van Kolck, U. (2014, January). Some Mileposts in the Road from QCD to Nuclear Structure. First Sino-French Workshop on Compact Matter Physics. Beijing: Beihang University.
• van Kolck, U. (2014, March). Effective Field Theory for Lattice Nuclei. Workshop on Understanding Nuclear Structure and Reactions Microscopically, Including the Continuum. Caen: GANIL.
• van Kolck, U. (2014, March). From QCD to Nuclei: Aspects of nuclear theory. 79th Meeting of the Nuclear Physics European Collaboration Committee. Strasbourg: NuPECC.
• van Kolck, U. (2014, October). Exposing the Limits of Time Reversal with Nuclei. Northwestern University. Evanston: Northwestern University.
• van Kolck, U. (2014, October). Few-Nucleon Systems in a Quirky World. 7th International and Interdisciplinary Workshop on the Dynamics of Critically Stable Quantum Few--Body Systems. Santos.
• van Kolck, U. (2013, April). Lectures on the Effective Field Theory Approach. Majorana Lectures on Quantum Field Theory. Napoli: Istituto Nazionale di Fisica Nucleare.
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  Lectures.
• van Kolck, U. (2013, August). SM and BSM Time-Reversal Violation in Light Nuclei. Program on Nuclei and Fundamental Symmetries: Theory Needs of Next-Decade Experiments. Seattle, WA: National Institiute for Nuclear Theory.
• van Kolck, U. (2013, January). Trapped (Light) Nuclear Structure. International Workshop XLI on Gross Properties of Nuclei and Nuclear Excitations. Hirschegg.
• van Kolck, U. (2013, March). Harmonic Effective Field Theory: (light) nuclei ab initio primo. FUSTIPEN Topical Meeting on the Microscopic Description of Light Nuclei. Caen: GANIL.
• van Kolck, U. (2013, March). The Story of Chiral EFT. Program on Computational and Theoretical Advances for Exotic Isotopes in the Medium Mass Region. Seattle, WA: National Institiute for Nuclear Theory.
• van Kolck, U. (2013, November). Time-Reversal Violation in the Nucleon and Light Nuclei. Los Alamos National Laboratory. Los Alamos: Los Alamos National Laboratory.
• van Kolck, U. (2013, October). Time-Reversal Violation in the Nucleon and Light Nuclei. 13th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon. Rome.
• van Kolck, U. (2012, April). Harmonic EFT: Trapped atoms and liberated nucleons. Program on the Extreme Matter Physics of Nuclei: From Universal Properties to Neutron-Rich Extremes. Darmstadt: ExtreMe Matter Institute (EMMI).
• van Kolck, U. (2012, April). Shallow Nuclei in Effective Field Theory. Focus Program From Dense Matter to Compact Stars in QCD and hQCD. Pohang: WCU-APCTP.
• van Kolck, U. (2012, April). Time-Reversal Violation in the Nucleon and the Nucleus. 6th International Conference on Quarks and Nuclear Physics. Palaiseau.
• van Kolck, U. (2012, December). Nuclear Physics from QCD. Assemblee Generale des Theoriciens Nucleaires. Caen: GANIL.
• van Kolck, U. (2012, July). Is the World Fine-Tuned. Institut NonLineaire de Nice. Sophia Antipolis.
• van Kolck, U. (2012, June). Is the World Fine-Tuned. Chalmers University. Goeteborg: Chalmers University.
• van Kolck, U. (2012, June). Is the World Fine-Tuned. Institut de Physique Nucleaire. Orsay: Institut de Physique Nucleaire.
• van Kolck, U. (2012, March). A Little Less Microscopically: Halo nuclei through the lens of EFT. Topical Meeting on Understanding Light Nuclei Microscopically. GANIL: FUSTIPEN.
• van Kolck, U. (2012, March). Bobbing Up: Dynamics from symmetry violation. Symposium on Electroweak Nuclear Physics. Durham: Duke University.
• van Kolck, U. (2012, March). Is the World Fine-Tuned. University of Texas at San Antonio. San Antonio: University of Texas at San Antonio.
• van Kolck, U. (2012, March). Time-Reversal Violation in the Nucleon and Light Nuclei. Jefferson Laboratory. Newport News: Jefferson Laboratory.
• van Kolck, U. (2012, May). An Algebraic Realization of Chiral Symmetry in Pion-Nucleon Scattering. Workshop on Many Manifestations of Non-Perturbative QCD. Caraguatatuba.
• van Kolck, U. (2012, May). Nuclear Physics from QCD. Mini-Workshop on Perspectives in Nonperturpative QCD. Sao Paulo: ICTP-SAIFR.
• van Kolck, U. (2012, November). Electric Dipole Moments of Light Nuclei From Chiral Effective Field Theory. Workshop on Electroweak Properties of Light Nuclei. Seattle, WA: INT.
• van Kolck, U. (2012, October). The No-Core Shell Model as an Effective Theory. Workshop on Shell Model as a Unified View of Nuclear Structure. Strasbourg.
• van Kolck, U. (2012, October). Three-Body Forces in Halo EFT. Program on Light Nuclei from First Principles. Seattle, WA: INT.
• van Kolck, U. (2012, October). Time-Reversal Violation in the Nucleon and the Nucleus. Workshop on EDM Searches at Storage Rings. Trento: European Center for Theoretical Nuclear Physics and Related Areas.
• van Kolck, U. (2012, September). The Atomic Nucleus and the Neo—Impressionist. Khalifa University. Abu Dhabi: Khalifa University.
• van Kolck, U. (2012, September). X(3872): The hidden charm of nuclear physics. PANDA XLII Collaboration Meeting. Paris.

Others

• Kolck, U. V. (2018, April). Nuclear Physics with Effective Field Theory. Nuclear Physics with Effective Field Theory.
• Pavon Valderrama, M., & van Kolck, U. (2016, May). Special Issue on Effective Field Theory in Nuclear Physics. Int. J. Mod. Phys. E.
• Moghrabi, K., Grasso, M., & van Kolck, U. (2013, December). Renormalizability of the Nuclear Many-Body Problem with the Skyrme Interaction Beyond Mean Field. arXiv:1312.5949.