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ID 19501
file
creator
PHENIX Collaboration
Hachiya, Takashi
Kohara, Ryota
Nakamura, Tomoaki
Tsuchimoto, Yuji
subject
electromagnetic decays
photon production
pion decay
eta mesons
perturbation theory
quantum chromodynamics
proton-proton inclusive interactions
abstract
A measurement of direct photons in p + p collisions at √s = 200 GeV is presented. A photon excess above background from π0 → γ + γ, η → γ + γ and other decays is observed in the transverse momentum range 5.5 < pT < 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.
journal title
Physical Review D - Particles, Fields, Gravitation and Cosmology
volume
Volume 71
issue
Issue 7
start page
071102-1
end page
071102-7
date of issued
2005-04-08
publisher
American Physical Society
issn
1550-7998
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2005 The American Physical Society.
relation url
department
Graduate School of Science