Unintegrated gluon distribution of a nucleus and photon-jet correlations

TL;DR

This paper develops a model for the unintegrated gluon distribution in nuclei using nonlinear evolution equations and proposes photon-jet correlations as a direct experimental probe of nuclear gluon distributions in proton-nucleus collisions.

Contribution

It introduces a new impact parameter dependent gluon distribution model based on nonlinear evolution and Glauber--Gribov input, and suggests photon-jet correlations as a novel probe.

Findings

Constructed a realistic impact parameter dependent gluon distribution.

Proposed photon-jet correlations as a direct probe of nuclear gluon distributions.

Provides a theoretical framework for analyzing pA collision data.

Abstract

An impact parameter dependent unintegrated gluon distribution is constructed as a solution of a nonlinear evolution equation with realistic Glauber--Gribov input. Photon--jet correlations in the proton fragmentation region of pA collisions are proposed as a direct probe of the nuclear unintegrated glue.