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Title: The importance of few-nucleon forces in chiral effective field theory

Journal Article · · European Physical Journal. A, Hadrons and Nuclei (Online)
ORCiD logo [1];  [2];  [2];  [3];  [4];  [5]
  1. Chalmers University of Technology, Göteborg (Sweden); Nuclear Physics Institute of the Czech Academy of Sciences (CAS), Řež (Czech Republic); Horia Hulubei National Institute for Physics and Nuclear Engineering, Magurele (Romania)
  2. Chalmers University of Technology, Göteborg (Sweden)
  3. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); University of Tennessee, Knoxville, TN (United States)
  4. Mississippi State University, MS (United States)
  5. Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay (France); University of Arizona, Tucson, AZ (United States)

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 16O 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. In conclusion, the enhancement mechanism we found is very general and could be important also in other many-body problems.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF); Swedish Research Council; Czech Science Foundation (GACR)
Grant/Contract Number:
AC05-00OR22725; FG02-04ER41338; SC0018223
OSTI ID:
2217698
Journal Information:
European Physical Journal. A, Hadrons and Nuclei (Online), Journal Name: European Physical Journal. A, Hadrons and Nuclei (Online) Journal Issue: 10 Vol. 59; ISSN 1434-601X
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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