Measurement of Direct Photon Production in p + p Collisions at √sNN = 200 GeV

Physical Review Letters Volume 98 Issue 1 Page 012002-1-012002-6 published_at 2007-01-05
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Title ( eng )
Measurement of Direct Photon Production in p + p Collisions at √sNN = 200 GeV
Creator
PHENIX Collaboration
Hachiya Takashi
Kohara Ryota
Nakamura Tomoaki
Tsuchimoto Yuji
Source Title
Physical Review Letters
Volume 98
Issue 1
Start Page 012002-1
End Page 012002-6
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 < pT < 16 GeV/c. Next-to-leading order perturbative QCD (pQCD) describes the data well for pT > 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 pT > 7 GeV/c.
Language
eng
Resource Type journal article
Publisher
American Physical Society
Date of Issued 2007-01-05
Rights
Copyright (c) 2007 The American Physical Society.
Publish Type Version of Record
Access Rights open access
Source Identifier
[ISSN] 0031-9007
[DOI] 10.1103/PhysRevLett.98.012002
[NCID] AA00773679
[DOI] http://dx.doi.org/10.1103/PhysRevLett.98.012002