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Advances in High Energy Physics
Volume 2017 (2017), Article ID 3802381, 10 pages
https://doi.org/10.1155/2017/3802381
Research Article

Predictions for the Isolated Prompt Photon Production at the LHC at = 13 TeV

Faculty of Physics, Semnan University, P.O. Box 35131-19111, Semnan, Iran

Correspondence should be addressed to Muhammad Goharipour

Received 22 September 2016; Revised 2 February 2017; Accepted 28 February 2017; Published 12 March 2017

Academic Editor: Anna Cimmino

Copyright © 2017 Muhammad Goharipour and Hossein Mehraban. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The publication of this article was funded by SCOAP3.

Abstract

The prompt photon production in hadronic collisions has a long history of providing information on the substructure of hadrons and testing the perturbative techniques of QCD. Some valuable information about the parton densities in the nucleon and nuclei, especially of the gluon, can also be achieved by analysing the measurements of the prompt photon production cross section whether inclusively or in association with heavy quarks or jets. In this work, we present predictions for the inclusive isolated prompt photon production in pp collisions at center-of-mass energy of 13 TeV using various modern PDF sets. The calculations are presented as a function of both photon transverse energy and pseudorapidity for the ATLAS kinematic coverage. We also study in detail the theoretical uncertainty in the cross sections due to the variation of the renormalization, factorization, and fragmentation scales. Moreover, we introduce and calculate the ratios of photon momenta for different rapidity regions and study the impact of various input PDFs on such quantity.