26-31 July 2021
Mexico City
Mexico/General timezone
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Mexico City -
QCD and Hadron Structure

Extracting the nucleon axial form factor from Lattice QCD using chiral perturbation theory


  • Mr. Fernando ALVARADO

Primary authors


The axial f.f. is a fundamental property of the nucleon and a key ingredient of neutrino-nucleon cross sections. We have calculated this f.f. in relativistic ChPT at leading and next to leading one-loop orders, assessing the impact of truncation in the determination of LECs from recent LQCD results. The explicit Delta(1232) is crucial to reconcile the light-quark mass dependence of the axial charge with phenomenology. The axial radius is also extracted without relying on ad-hoc parametrisations.