Dijet correlations in $pp$ collisions at RHIC

TL;DR

This paper compares $k_t$-factorization and NLO collinear approaches for dijet correlations in $pp$ collisions at RHIC, highlighting the impact of different gluon distributions and including new subprocesses in the analysis.

Contribution

It introduces the first inclusion of certain $k_t$-factorization subprocesses and compares different unintegrated gluon distributions in dijet correlation studies.

Findings

Results vary with the choice of UGDF/UPDF.

$k_t$-factorization captures azimuthal correlations effectively.

Limitations are discussed due to leading jet conditions.

Abstract

We compare results of $k_t$-factorization approach and next-to-leading order collinear-factorization approach for dijet correlations in proton-proton collisions at RHIC energies. We discuss correlations in azimuthal angle as well as correlations in two-dimensional space of transverse momenta of two jets. Some $k_t$-factorization subprocesses are included for the first time in the literature. Different unintegrated gluon/parton distributions are used in the $k_t$-factorization approach. The results depend on UGDF/UPDF used. Limitations due to leading jet condition are discussed.