The nucleon axial-vector coupling beyond one loop

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.

9 pp, 2 figs

References in corpus (9)

• The nucleon axial charge in full lattice QCD
• Axial coupling constant of the nucleon for two flavours of dynamical quarks in finite and infinite volume
• Cutoff schemes in chiral perturbation theory and the quark mass expansion of the nucleon mass
• Baryon masses, chiral extrapolations, and all that
• The pion and proton mass in finite volume
• Axial and tensor charge of the nucleon with dynamical fermions
• Quark mass dependence of baryon properties
• The chiral logs of the K -> pi pi amplitude
• Quark mass dependence of nucleon mass and axial-vector coupling constant

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