The importance of few-nucleon forces in chiral effective field theory
Artikel i vetenskaplig tidskrift, 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.
Författare
Chieh-Jen Yang
Nuclear Physics Institute
Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering
Chalmers, Fysik, Subatomär, högenergi- och plasmafysik
Andreas Ekström
Chalmers, Fysik, Subatomär, högenergi- och plasmafysik
Christian Forssén
Chalmers, Fysik, Subatomär, högenergi- och plasmafysik
G. Hagen
University of Tennessee
Oak Ridge National Laboratory
G. Rupak
College of Arts & Sciences
U. van Kolck
University of Arizona
Université Paris-Saclay
European Physical Journal A
1434-6001 (ISSN) 1434-601X (eISSN)
Vol. 59 10 233Svaga och sällsynta processer i atomkärnan: fundamentala symmetrier och mörk materia
Vetenskapsrådet (VR) (2017-04234), 2018-01-01 -- 2021-12-31.
Strong interactions for precision nuclear physics (PrecisionNuclei)
Europeiska kommissionen (EU) (EC/H2020/758027), 2018-02-01 -- 2023-01-31.
Ämneskategorier
Subatomär fysik
Annan fysik
DOI
10.1140/epja/s10050-023-01149-7