$x_F$ Dependence of Drell-Yan Transverse Moemtum Broadening

TL;DR

This paper investigates how the transverse momentum broadening in Drell-Yan processes depends on the Feynman-x variable, using perturbative QCD to connect initial-state interactions with measurable effects.

Contribution

It demonstrates that the $x_F$ dependence of transverse momentum broadening can be calculated within a generalized factorization framework in perturbative QCD.

Findings

$ ext{Delta}<q_T^2>$ varies with } x_F$ in a calculable way.

$ ext{Transverse momentum broadening is a useful probe for initial-state multiple scattering.

The observable can help extract quark-gluon correlation functions.

Abstract

We analyze $x_F$ dependence of Drell-Yan transverse momentum broadening in hadron-nucleus collisions. In terms of generalized factorization theorem, we show that the $x_F$ dependence of transverse momentum broadening, $ \Delta < q_T^2 > (x_F) $, can be calculated in perturbative QCD. We demonstrate that $\Delta < q_T^2 > (x_F)$ is a good observable for studying the effects of initial-state multiple scattering and extracting quark-gluon correlation functions.