首页|Calculation of the axial-vector coupling constant $g_A$ to two loops in covariant chiral perturbation theory
Calculation of the axial-vector coupling constant $g_A$ to two loops in covariant chiral perturbation theory
Calculation of the axial-vector coupling constant $g_A$ to two loops in covariant chiral perturbation theory
We present a calculation of the leading two-loop corrections to the axial-vector coupling constant $g_A$ in two covariant versions of two-flavor baryon chiral perturbation theory. Taking the low-energy constants from a combined analysis of elastic and inelastic pion-nucleon scattering, we find that these corrections are rather moderate.
V??ronique Bernard、Jambul Gegelia、Shayan Ghosh、Ulf-G. Mei??ner
10.1016/j.physletb.2025.139637
物理学
V??ronique Bernard,Jambul Gegelia,Shayan Ghosh,Ulf-G. Mei??ner.Calculation of the axial-vector coupling constant $g_A$ to two loops in covariant chiral perturbation theory[EB/OL].(2025-06-19)[2025-07-23].https://arxiv.org/abs/2505.05941.点此复制
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