Local chiral EFT potentials in nuclei and neutron matter: results and issues

Journal Article · Fri Feb 28 04:00:00 EST 2020 · PoS - Proceedings of Science

DOI:https://doi.org/10.22323/1.317.0100· OSTI ID:1605124

Lonardoni, Diego ^[1]; Tews, Ingo ^[2]

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1. Michigan State Univ., East Lansing, MI (United States). Facility for Rare Isotope Beams; Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

In recent years, the combination of advanced quantum Monte Carlo (QMC) methods and local interactions derived from chiral effective field theory (EFT) has been shown to provide a versatile and systematic approach to nuclear systems. Calculations at next-to-next-to-leading order in chiral EFT have lead to fascinating results for nuclei and nucleonic matter. On the one hand, ground-state properties of nuclei are well reproduced up to A $$≤$$ 16, even though these potentials have been fit to nucleon-nucleon scattering and few-body observables only. On the other hand, a reasonable description of neutron-matter properties emerges. While regulator functions applied to two- and three-nucleon forces are a necessary ingredient in these many-body calculations, the use of local regulators leads to a substantial residual regulator and cutoff dependence that increases current theoretical uncertainties. In this contribution, we review local chiral interactions, their applications, and QMC results for nuclei and neutron matter. In addition, we address regulator issues for such potentials and present a possible path forward.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
• Sponsoring Organization: USDOE Office of Science (SC). Nuclear Physics (NP) (SC-26); USDOE National Nuclear Security Administration (NNSA); FRIB Theory Alliance; USDOE Laboratory Directed Research and Development (LDRD) Program
• Grant/Contract Number: 89233218CNA000001; SC0013617; SC0013617; AC02-05CH11231
• OSTI ID: 1605124
• Report Number(s): LA-UR--19-22185
• Journal Information: PoS - Proceedings of Science, Journal Name: PoS - Proceedings of Science Vol. 317; ISSN 1824-8039
• Publisher: SISSA
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
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Nuclear and Particle Physics