Sub-leading twist transverse momentum dependent parton distributions in the light-front quark-diquark model

TL;DR

This paper investigates sub-leading twist transverse momentum dependent distributions of the proton using a light-front quark-diquark model, deriving explicit expressions and comparing results with other models and experimental data.

Contribution

It provides explicit formulas for sub-leading twist TMDs in the light-front quark-diquark model and compares them with other models and experimental results.

Findings

Derived overlap form of LFWFs for sub-leading twist TMDs.

Compared transverse momentum moments with other models.

Compared PDF e(x) results with CLAS data.

Abstract

In this study, the T-even sub-leading twist transverse momentum dependent distributions (TMDs) of proton in the light-front quark-diquark model (LFQDM) have been investigated. We have derived the overlap form of the light-front wave functions (LFWFs) for the sub-leading twist proton TMDs by detangling the un-integrated quark-quark correlator for the semi-inclusive deep inelastic scattering (SIDIS). We have obtained the explicit expressions of TMDs for both the cases of the diquark being a scalar or a vector and analysed their relationships with leading twist TMDs within the same model. Average transverse momenta and average square transverse momenta for the TMDs have been tabulated and compared with the results from the light-front bag model and the light-front constituent quark model (LFCQM). In addition to this, we have also compared our results for the PDF $e(x)$ with the recent CLAS collaboration results.