Tensor form factors of nucleon in QCD

TL;DR

This paper calculates the isovector tensor form factors of the nucleon using light-cone QCD sum rules, providing insights into the nucleon's transverse spin structure through advanced theoretical methods.

Contribution

The study introduces a calculation of nucleon tensor form factors employing light-cone QCD sum rules with twist-6 distribution amplitudes, extending previous analyses.

Findings

Results agree with other approaches at various momentum transfers.

Provides detailed tensor form factors $H_T$, $E_T$, and $ ilde{H}_T$.

Enhances understanding of nucleon spin structure.

Abstract

We extract the isovector tensor nucleon form factors, which play an important role in understanding the transverse spin structure of the nucleon when related to the quark helicity-flip generalized parton distributions via their first moments. We employ the light-cone QCD sum rules to leading order in QCD and include distribution amplitudes up to twist 6 in order to calculate the three tensor form factors $H_T$, $E_T$ and $\tilde{H}_T$. Our results agree well with those from other approaches in the low and high momentum-transfer regions.