The Isolated Photon Cross Section in p pbar Collisions at sqrt(s) = 1.8 TeV

Details The Isolated Photon Cross Section in p pbar Collisions at sqrt(s) = 1.8 TeV The Isolated Photon Cross Section in p pbar Collisions at sqrt(s) = 1.8 TeV

1999-12-07

arxiv.org/abs/hep-ex/9912017v1

Phys.Rev.Lett.84:2786-2791,2000

Physics

High Energy Physics

High Energy Physics - Experiment

12 pages, 4 figures, LaTeX. Submitted to Physical Review Letters

Scientific paper

10.1103/PhysRevLett.84.2786

We report a new measurement of the cross section for the production of isolated photons, with transverse energies (ET) above 10 GeV and pseudorapidities |eta| < 2.5, in p pbar collisions at sqrt{s} = 1.8 TeV. The results are based on a data sample of 107.6 pb-1 recorded during 1992--1995 with the D0 detector at the Fermilab Tevatron collider. The background, predominantly from jets which fragment to neutral mesons, was estimated using the longitudinal shower shape of photon candidates in the calorimeter. The measured cross section is in good agreement with the next-to-leading order (NLO) QCD calculation for ET > 36 GeV.

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