The nucleon axial-vector coupling beyond one loop

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Abstract

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. © 2006 Elsevier B.V. All rights reserved.

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Bernard, V., & Meißner, U. G. (2006). The nucleon axial-vector coupling beyond one loop. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 639(3–4), 278–282. https://doi.org/10.1016/j.physletb.2006.06.018

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