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

2025/01/06 by Ru-You Zheng, Zhi-Wei Liu, Zheng, Ru-You +7 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #Nuclear Theory (nucl-th) #Pulsars and Gravitational Waves Research #Quantum Chromodynamics and Particle Interactions #Quantum, superfluid, helium dynamics

paper · pdf · doi:10.48550/arxiv.2501.02826

openalex publication_date 2025/01/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

In-medium ΛN interactions are crucial in hypernuclei and neutron star physics. In this work, we study the in-medium ΛN 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 ΛN interactions, urgently needed in relativistic ab initio hypernuclear physics studies.

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• Properties of hyperons in nuclear matter from chiral hyperon-nucleon interactions at next-to-next-to-leading order

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