Work

In-medium ΛN interactions with leading order covariant chiral hyperon/nucleon-nucleon forces

Year: 2025

Type: article

Abstract: In-medium Λ N interactions are crucial in hypernuclei and neutron star physics. In this work, we study the in-medium Λ N interaction within the relativistic Brueckner-Hartree-Fock (RBHF) framework, employing the leading-order covariant chiral hyperon/nucleon-nucleon forces for the first time. We demonstrate that a consistent description of both the experimental cross-section data and the ‘empirical value’ of the Λ single-particle potential can be achieved. This contrasts with the majority of studies in the non-relativistic framework, where higher-order two-body chiral forces are typically required. This study offers a new perspective on the in-medium Λ N interactions, urgently needed in relativistic ab initio hypernuclear physics studies.

Source: Physics Letters B

DOI: 10.1016/j.physletb.2025.139416

Authors: Ru-You Zheng, Zhi-Wei Liu, Li-Sheng Geng, Jin-Niu Hu, Sibo Wang

Institutions: Beihang University, Chinese Academy of Sciences, Institute of Modern Physics, Nankai University, Chongqing University

Language: English

Topic: Nuclear physics research studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: National Natural Science Foundation of China, China Postdoctoral Science Foundation, National Key Research and Development Program of China

Awards: G2188395147, G2866366760, G7843989478, G7964350045, G8252046028