Soft photon and two hard jets forward production in proton-nucleus collisions

TL;DR

This paper calculates the cross section for producing a soft photon and two hard jets in proton-nucleus collisions at high energies, focusing on different kinematic regimes and the role of gluon distributions.

Contribution

It introduces a hybrid formalism approach to analyze soft photon and jet production, highlighting the dependence on gluon TMDs and different momentum imbalance regimes.

Findings

Cross section depends on the first two TMD gluon distributions.

Results cover both correlation limit and dilute target limit.

Provides insights into gluon distributions in the nucleus.

Abstract

We calculate the cross section for production of a soft photon and two hard jets in the forward rapidity region in proton-nucleus collisions at high energies. The calculation is performed within the hybrid formalism. The hardness of the final particles is defined with respect to the saturation scale of the nucleus. We consider both the correlation limit of small momentum imbalance and the dilute target limit where the momentum imbalance is of the order of the hardness of the jets. The results depend on the first two transverse-momentum-dependent (TMD) gluon distributions of the nucleus.