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Article Dans Une Revue Eur.Phys.J.A Année : 2023

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

C.-J. Yang
  • Fonction : Auteur
A. Ekström
  • Fonction : Auteur
C. Forssén
  • Fonction : Auteur
G. Hagen
  • Fonction : Auteur
G. Rupak
  • Fonction : Auteur

Résumé

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 $A\simeq 10-20$. 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.

Dates et versions

hal-03376701 , version 1 (13-10-2021)

Identifiants

Citer

C.-J. Yang, A. Ekström, C. Forssén, G. Hagen, G. Rupak, et al.. The importance of few-nucleon forces in chiral effective field theory. Eur.Phys.J.A, 2023, 59 (10), pp.233. ⟨10.1140/epja/s10050-023-01149-7⟩. ⟨hal-03376701⟩
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