T-odd quark-gluon-quark correlation function in the diquark model

TL;DR

This paper investigates the T-odd quark-gluon-quark correlation function within a diquark model, calculating twist-3 distributions and comparing interaction-dependent and independent TMDs to understand their properties.

Contribution

It introduces a calculation of T-odd twist-3 quark distributions using a spectator diquark model with a dipole form factor, providing finite results and comparison with interaction-independent TMDs.

Findings

Calculated eight T-odd twist-3 quark distributions.

Implemented a dipole form factor for finiteness.

Compared interaction-dependent and independent TMDs.

Abstract

We study the transverse momentum dependent quark-gluon-quark correlation function. Using a spectator diquark model, we calculate the eight time-reversal-odd interaction-dependent twist-3 quark distributions appearing in the decomposition of the transverse momentum dependent quark-gluon-quark correlator. In order to obtain finite results, we assume a dipole form factor for the nucleon-quark-diquark coupling, instead of a point-like coupling. The results are compared with the time-reversal-odd interaction-independent twist-3 TMDs calculated in the same model.