The importance of few-nucleon forces in chiral effective field theory
Journal article, 2023
We study the importance of few-nucleon forces in chiral effective field theory for describing many-nucleon systems. A combinatorial argument suggests that three-nucleon forces-which are conventionally regarded as next-to-next-to-leading order-should accompany the two-nucleon force already at leading order (LO) starting with mass number A≃ 10–20. We find that this promotion enables the first realistic description of the 16 O ground state based on a renormalization-group-invariant LO interaction. We also performed coupled-cluster calculations of the equation of state for symmetric nuclear matter and our results indicate that LO four-nucleon forces could play a crucial role for describing heavy-mass nuclei. The enhancement mechanism we found is very general and could be important also in other many-body problems.
Author
Chieh-Jen Yang
Nuclear Physics Institute
Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering
Chalmers, Physics, Subatomic, High Energy and Plasma Physics
Andreas Ekström
Chalmers, Physics, Subatomic, High Energy and Plasma Physics
Christian Forssén
Chalmers, Physics, Subatomic, High Energy and Plasma Physics
G. Hagen
University of Tennessee
Oak Ridge National Laboratory
G. Rupak
College of Arts & Sciences
U. van Kolck
University of Arizona
University Paris-Saclay
European Physical Journal A
1434-6001 (ISSN) 1434-601X (eISSN)
Vol. 59 10 233Weak and rare nuclear processes: nuclear probes of fundamental symmetries and dark matter
Swedish Research Council (VR) (2017-04234), 2018-01-01 -- 2021-12-31.
Strong interactions for precision nuclear physics (PrecisionNuclei)
European Commission (EC) (EC/H2020/758027), 2018-02-01 -- 2023-01-31.
Subject Categories
Subatomic Physics
Other Physics Topics
DOI
10.1140/epja/s10050-023-01149-7