Axial form factor of the nucleon at large momentum transfers

Abstract

Motivated by the emerging possibilities to study threshold pion electroproduction at large momentum transfers at Jefferson Laboratory following the 12 GeV upgrade, we provide a short theory summary and an estimate of the nucleon axial form factor for large virtualities in the $Q^2 = 1-10~\text{GeV}^2$ range using next-to-leading order light-cone sum rules.Comment: A comparison to the new neutrino data analysis and several references added. Final version to appear in Phys.Rev.