Prompt photons at hadron colliders

Abstract

\title{Prompt photons at hadron colliders} The production of prompt isolated photons at hadron colliders provides a stringent test of perturbative Quantum Chromodynamics (pQCD), and can be used to probe parton distribution functions (PDFs) and the parton-to-photon fragmentation functions (FFs). The ATLAS collaboration has performed the measurement of the inclusive production of isolated prompt photons in 20.2 fb$^{-1}$ of data collected at a center-of-mass energy of 8 TeV, differential in both pseudorapidity and the photon transverse momentum. The CDF collaboration has performed the measurement of the cross section for the inclusive production of isolated prompt photons in proton-antiproton collisions at center-of-mass energy $\sqrt{s}$ = 1.96 TeV, using the full Run II data sample which corresponds to an integrated luminosity of 9.5 fb$^{-1}$. The cross section is measured as a function of photon transverse energy in the pseudorapidity region $|\eta^{\gamma}|<$ 1.0. The results are compared with predictions from parton-shower Monte Carlo models at leading order in quantum chromodynamics (QCD) and from next-to-leading order perturbative QCD calculations.