Charge symmetry breaking effects of ω-ρ⁰ mixing in relativistic mean-field model

2025/06/07 by Tanimura, Yusuke, Naito, Tomoya, Sagawa, Hiroyuki +1
#FOS: Physical sciences #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.2506.06629

Abstract

We present a relativistic mean-field model that incorporates charge symmetry breaking (CSB) of nuclear force via ω- ρ⁰ meson mixing, along with corrections to the electromagnetic interaction including the nucleon form factors, first-order vacuum polarization, and Coulomb exchange and pairing terms. The model parameters are refitted using the mass differences of T = 1/2 mirror nuclei and ground-state properties of magic nuclei, yielding DD-ME-CSB parameter set. The DD-ME-CSB parameter set reproduces the mass differences of mirror nuclei reasonably well up to T = 2 , demonstrating the importance of ω- ρ⁰ mixing. A connection of the present model to a Skyrme-type CSB interaction is also established through a gradient expansion of the energy density functional.

Citations

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