Double parton scattering and 3D proton structure: A Light-Front analysis

TL;DR

This paper introduces a Light-Front model approach to analyze double parton scattering and the effective cross section, revealing its dependence on parton momentum fractions and providing insights into the proton's 3D structure.

Contribution

It presents a novel Light-Front model framework to evaluate and evolve the effective cross section for double parton scattering, linking it to the proton's three-dimensional structure.

Findings

Numerical results align with experimental data.

$\sigma_{eff}$ shows dependence on parton momentum fractions.

Model predicts $x_i$ dependence related to double parton correlations.

Abstract

Double parton scattering, occurring in high energy hadron-hadron collisions, e.g. at the LHC, is usually investigated through model dependent analyses of the so called effective cross section $\sigma_{eff}$. We present a dynamic approach to this fundamental quantity making use of a Light-Front model treatment. Within such a framework $\sigma_{eff}$ is initially evaluated at low energy scale using the model and then, through QCD evolution, at high energy scale to reach the experimental conditions. Our numerical outcomes are consistent with the present experimental analyses of data in kinematical region we investigate. An important result of the present work is the $x_i$ dependence of $\sigma_{eff}$, a feature directly connected to double parton correlations and which could unveil new information on the three dimensional structure of the proton.