Details

Autor(en) / Beteiligte

• Yang, C.-J.
• Ekström, A.
• Forssén, C.
• Hagen, G.
• Rupak, G.
• van Kolck, U.

Titel

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

Ist Teil von

• The European physical journal. A, Hadrons and nuclei, 2023-10, Vol.59 (10), Article 233

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2023

Link zum Volltext

Quelle

SpringerLink (Online service)

Beschreibungen/Notizen

• 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.