Measurements of isolated prompt photons in pp collisions at 7 TeV in ATLAS

TL;DR

This paper reports measurements of isolated prompt photon production cross sections in proton-proton collisions at 7 TeV using ATLAS data, comparing results with next-to-leading-order QCD predictions.

Contribution

It provides new experimental data on prompt photon cross sections at 7 TeV, covering specific pseudorapidity and energy ranges, and compares these with theoretical calculations.

Findings

Measured cross sections agree with NLO QCD predictions within uncertainties.

Data covers a wide transverse energy range from 15 to 400 GeV.

Results improve understanding of photon production in high-energy collisions.

Abstract

Two recent measurements of the cross section for the inclusive production of isolated prompt photons in pp collisions at a center-of-mass energy sqrt(s) = 7 TeV are presented. The results are based on data collected in 2010 with the ATLAS detector at the Large Hadron Collider. The measurements cover the pseudorapidity ranges |eta(gamma)|<1.37 and 1.52<|eta(gamma)|<2.37 and the transverse energy range 15 < ET(gamma) < 400 GeV. The measured cross sections are compared to predictions from next-to-leading-order perturbative QCD calculations.