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The nucleon axial-vector coupling beyond one loop

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arxiv hep-lat/0605010 v1 pith:RAKAFWDJ submitted 2006-05-14 hep-lat hep-phnucl-th

Véronique Bernard , Ulf-G. Mei{ss}ner This is my paper · ORCID
classification hep-lathep-phnucl-th
keywords axial-vectorchiralcouplingnucleonanalyzebelowbeyonddata
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We analyze the nucleon axial-vector coupling to two loops in chiral perturbation theory. We show that chiral extrapolations based on this representation require lattice data with pion masses below 300 MeV.

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  1. Calculation of the axial-vector coupling constant $g_A$ to two loops in covariant chiral perturbation theory

    hep-ph 2025-05 conditional novelty 6.0 of 10

    The complete order-M^4 two-loop corrections to g_A are derived in EOMS and infrared covariant baryon chiral perturbation theory and evaluated with scattering-derived low-energy constants.

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