June 22, 2006Open Access

The nucleon axial-vector coupling beyond one loop

VBVéronique BernardCentre National de la Recherche Scientifique UMUlf-G. MeißnerUniversité Paris-Sud

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Resumen

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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Bernard et al. (Thu,) studied this question.

synapsesocial.com/papers/6a14edfeda545ed9969aeecb https://doi.org/https://doi.org/10.1016/j.physletb.2006.06.018

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