Isovector axial-vector form factors of octet baryons in QCD

TL;DR

This paper calculates the isovector axial-vector form factors of octet baryons using light-cone QCD sum rules, achieving good agreement with experimental and lattice data at low momentum transfers.

Contribution

It provides the first comprehensive calculation of these form factors for multiple baryons using light-cone QCD sum rules including up to twist 6 distribution amplitudes.

Findings

Results agree qualitatively and quantitatively with experimental data.

Provides detailed predictions for axial-vector and induced pseudoscalar form factors.

Extends the application of light-cone QCD sum rules to octet baryons.

Abstract

We compute the diagonal isovector axial-vector as well as induced pseudoscalar form factors of nucleon, $\Sigma$ and $\Xi$ baryons by employing the light-cone QCD sum rules to leading order in QCD and including distribution amplitudes up to twist 6. Extrapolating our sum-rules results to low-momentum transfers, we make a comparison with experimental and lattice-QCD results where we can achieve a nice qualitative and quantitative agreement.