Campus Units

Physics and Astronomy

Document Type

Article

Publication Version

Published Version

Publication Date

1-2007

Journal or Book Title

Physical Review Letters

Volume

98

Issue

1

First Page

012002

DOI

10.1103/PhysRevLett.98.012002

Abstract

Cross sections for midrapidity production of direct photons in p+p collisions at the Relativistic Heavy Ion Collider (RHIC) are reported for transverse momenta of 3 < p(T)< 16 GeV/c. Next-to-leading order 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.

Comments

This article is published as Adler, Stephen Scott, S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, A. Al-Jamel, J. Alexander et al. "Measurement of direct photon production in p+ p collisions at s= 200 GeV." Physical review letters 98, no. 1 (2007): 012002. DOI:10.1103/PhysRevLett.98.012002. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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