Mid-Rapidity Direct-Photon Production in p+p Collisions at sqrt(s) = 200 GeV
High Energy Physics - Experiment
2008-11-26 v1
Abstract
A measurement of direct photons in p+p collisions at sqrt(s)=200 GeV is presented. A photon excess above background from pi^0 --> gamma+gamma, eta --> gamma+gamma, and other decays is observed in the transverse momentum range 5.5 < p_T < 7 GeV/c. The result is compared to a next-to-leading-order perturbative QCD calculation. Within errors, good agreement is found between the QCD calculation and the measured result.
Cite
@article{arxiv.hep-ex/0502006,
title = {Mid-Rapidity Direct-Photon Production in p+p Collisions at sqrt(s) = 200 GeV},
author = {PHENIX Collaboration and S. Adler},
journal= {arXiv preprint arXiv:hep-ex/0502006},
year = {2008}
}
Comments
330 authors, 7 pages text, RevTeX, 2 figures, 2 tables. Submitted to Physical Review D. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html