Production of single isolated photons in the Parton Reggeization Approach

TL;DR

This paper investigates single isolated photon production at LHC energies using the Parton Reggeization Approach, incorporating LO and NLO* contributions, and compares theoretical predictions with experimental data.

Contribution

It introduces a novel application of the Parton Reggeization Approach with a subtraction scheme to avoid double counting in photon production calculations.

Findings

Theoretical predictions align well with experimental data.

Inclusion of NLO* corrections improves accuracy.

The subtraction scheme effectively prevents double counting.

Abstract

In the article, we study the processes of single isolated photon production at the LHC energies in the framework of the Parton Reggeization Approach taking into account LO and NLO* contributions, the last one includes only tree-level corrections. Reggeized amplitudes are constructed according to the effective field theory formalism for multi-Regge kinematics processes suggested by L.N. Lipatov. To avoid the double counting between tree-level corrections and unintegrated parton distribution functions, a subtraction scheme is introduced. The results of calculations are compared with experimental data.