Measurement of the Isolated Photon Cross Section in p-pbar Collisions at sqrt{s}=1.96 TeV

TL;DR

This paper reports a measurement of the isolated photon production cross section in proton-antiproton collisions at 1.96 TeV, comparing results with QCD predictions and finding good agreement within uncertainties.

Contribution

First measurement of isolated photon cross section at Tevatron energies with detailed comparison to NLO QCD calculations.

Findings

Measured cross section for photons with 23-300 GeV transverse momentum

Experimental results agree with NLO QCD predictions within uncertainties

Provides validation of perturbative QCD in high-energy photon production

Abstract

The cross section for the inclusive production of isolated photons has been measured in p anti-p collisions at sqrt{s}=1.96 TeV with the D0 detector at the Fermilab Tevatron Collider. The photons span transverse momenta 23 to 300 GeV and have pseudorapidity |eta|<0.9. The cross section is compared with the results from two next-to-leading order perturbative QCD calculations. The theoretical predictions agree with the measurement within uncertainties.