Quark-gluon double parton distributions in the light-front dressed quark model

TL;DR

This paper investigates the correlations between quarks and gluons in a light-front dressed quark model, revealing significant spin and kinematic correlations that impact double parton scattering predictions.

Contribution

It introduces a detailed calculation of quark-gluon double parton distributions in a light-front model, highlighting non-factorizable transverse dependencies and correlation strengths.

Findings

Significant spin-spin and spin-kinematic correlations identified.

Transverse dependence of DPDs does not factorize in the model.

Insights into correlation strengths across kinematic regions.

Abstract

We study parton distributions for two partons, a quark and a gluon, in the light-front dressed quark model, with focus on correlations between the two partons. The model calculation leads to sizable spin-spin and spin-kinematic correlations of interest for studies of double parton scattering (DPS) in high-energy collisions. In particular, we find that the transverse dependence of the double parton distributions (DPDs) does not factorize within the model. The results gives insight to the strengths of correlations in different kinematical regions, which can help in constructing input DPDs in cross section calculations.