Measurement of the Inclusive Isolated Photon Cross Section at CDF

TL;DR

This paper reports on the measurement of the inclusive isolated photon production cross section in proton-antiproton collisions at 1.96 TeV, using data from the CDF detector, and compares results to next-to-leading order QCD predictions.

Contribution

First measurement of the inclusive isolated photon cross section at Tevatron energies with detailed comparison to NLO pQCD.

Findings

Photon cross section measured for pT > 30 GeV and |η| < 1.0

Results are consistent with NLO pQCD predictions within uncertainties

Provides data for testing QCD and constraining parton distribution functions

Abstract

We present preliminary results on inclusive direct photon production in $p\bar{p}$ collisions at $\sqrt{s}$=1.96 TeV, using data collected with the upgraded Collider Detector at Fermilab in Run II, corresponding to an integrated luminosity of 451 pb$^{-1}$. Measurements are performed as a function of the photon transverse momentum for photons with $p_{T}>$30 GeV and $|\eta|<$1.0. Photons are required to be isolated in the calorimeter. The measurement is corrected to the hadron level and compared to NLO pQCD predictions.