Measurement of direct photon production in p + p collisions at sqrt(s) = 200 GeV

Details Measurement of direct photon production in p + p collisions at sqrt(s) = 200 GeV Measurement of direct photon production in p + p collisions at sqrt(s) = 200 GeV

2006-09-18

arxiv.org/abs/hep-ex/0609031v2

Phys.Rev.Lett.98:012002,2007

Physics

High Energy Physics

High Energy Physics - Experiment

330 authors, 6 pages text, 3 figures, one table. Submitted to Phys. Rev. Lett. Plain text data tables for the points plotted i

Scientific paper

10.1103/PhysRevLett.98.012002

Cross sections for mid-rapidity production of direct photons in p+p collisions at the Relativistic Heavy Ion Collider (RHIC) are reported for 3 < p_T < 16 GeV/c. Next-to-leading order (NLO) perturbative QCD (pQCD) describes the data well for p_T > 5 GeV/c, where the uncertainties of the measurement and theory are comparable. We also report on the effect of requiring the photons to be isolated from parton jet energy. The observed fraction of isolated photons is well described by pQCD for p_T > 7 GeV/c.

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