Calculation of the axial-vector coupling constant $g_A$ to two loops in covariant chiral perturbation theory
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| Main Authors: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866909653614460928 |
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| author | Bernard, Véronique Gegelia, Jambul Ghosh, Shayan Meißner, Ulf-G. |
| author_facet | Bernard, Véronique Gegelia, Jambul Ghosh, Shayan Meißner, Ulf-G. |
| contents | 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. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2505_05941 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Calculation of the axial-vector coupling constant $g_A$ to two loops in covariant chiral perturbation theory Bernard, Véronique Gegelia, Jambul Ghosh, Shayan Meißner, Ulf-G. High Energy Physics - Phenomenology High Energy Physics - Lattice Nuclear Experiment Nuclear 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. |
| title | Calculation of the axial-vector coupling constant $g_A$ to two loops in covariant chiral perturbation theory |
| topic | High Energy Physics - Phenomenology High Energy Physics - Lattice Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2505.05941 |