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

Abstract

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.

Authors:
ORCiD logo [1]; ORCiD logo [2]
  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)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
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
OSTI Identifier:
1605124
Report Number(s):
LA-UR-19-22185
Journal ID: 1824-8039
Grant/Contract Number:  
89233218CNA000001; SC0013617; AC02-05CH11231
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
PoS - Proceedings of Science
Additional Journal Information:
Journal Volume: 317; Conference: 9.International Workshop on Chiral Dynamics, Durham, NC (United States), 17-21 Sep 2018
Publisher:
SISSA
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 74 ATOMIC AND MOLECULAR PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Atomic, Nuclear and Particle Physics

Citation Formats

Lonardoni, Diego, and Tews, Ingo. Local chiral EFT potentials in nuclei and neutron matter: results and issues. United States: N. p., 2020. Web. doi:10.22323/1.317.0100.
Lonardoni, Diego, & Tews, Ingo. Local chiral EFT potentials in nuclei and neutron matter: results and issues. United States. doi:10.22323/1.317.0100.
Lonardoni, Diego, and Tews, Ingo. Fri . "Local chiral EFT potentials in nuclei and neutron matter: results and issues". United States. doi:10.22323/1.317.0100. https://www.osti.gov/servlets/purl/1605124.
@article{osti_1605124,
title = {Local chiral EFT potentials in nuclei and neutron matter: results and issues},
author = {Lonardoni, Diego and Tews, Ingo},
abstractNote = {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.},
doi = {10.22323/1.317.0100},
journal = {PoS - Proceedings of Science},
number = ,
volume = 317,
place = {United States},
year = {2020},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
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