The nucleon axial-vector coupling beyond one loop

doi:10.1016/j.physletb.2006.06.018

Physics Letters B

Volume 639, Issues 3–4, 10 August 2006, Pages 278-282

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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.

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^☆: This research is part of the EU Integrated Infrastructure Initiative Hadron Physics Project under contract number RII3-CT-2004-506078. Work supported in part by DFG (SFB/TR 16, “Subnuclear Structure of Matter”).

Physics Letters B

The nucleon axial-vector coupling beyond one loop☆

Abstract