Testing for kt-factorization with inclusive prompt photon production at LHC

TL;DR

This paper investigates the feasibility of analyzing inclusive prompt photon production at the LHC using the kt-factorization QCD approach, incorporating off-shell gluon fusion and various unintegrated parton densities.

Contribution

It introduces a detailed analysis of prompt photon production at LHC using kt-factorization, including quark contributions and different unintegrated parton density models.

Findings

Feasibility of using kt-factorization for prompt photon analysis at LHC.

Comparison of KMR and CCFM unintegrated parton densities.

Inclusion of quark subprocesses in the theoretical framework.

Abstract

We study the possibility to analyse the data on inclusive prompt photon production at first LHC runs in the framework of the kt-factorization QCD approach. Our consideration is based on the amplitude for the production of a single photon associated with a quark pair in the fusion of two off-shell gluons. The quark component is taken into account separately using the quark-gluon Compton scatterring and quark-antiquark annihilation QCD subprocesses. The unintegrated parton densities in a proton are determined using the Kimber-Martin-Ryskin (KMR) prescription as well as the CCFM evolution equation.