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Title: Measurement of Direct Photon Production in p+p Collisions at sqrt(s)=200 GeV

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.

Authors:
 [1];  [2];  [1];  [1];  [1];  [1];  [1];  [3];  [1];  [1];  [2];  [4]
  1. ORNL
  2. University of Tennessee, Knoxville (UTK) & Oak Ridge National Laboratory (ORNL)
  3. University of Tennessee, Knoxville (UTK)
  4. The
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
932004
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 1
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 74 ATOMIC AND MOLECULAR PHYSICS; CROSS SECTIONS; HEAVY IONS; PHOTONS; PRODUCTION; QUANTUM CHROMODYNAMICS

Citation Formats

Awes, Terry C, Batsouli, Sotiria, Cianciolo, Vince, Efremenko, Yuri V, Plasil, F, Read Jr, Kenneth F, Silvermyr, David O, Sorensen, Soren P, Stankus, Paul W, Young, Glenn R, Zhang, Chun, and PHENIX, Collaboration. Measurement of Direct Photon Production in p+p Collisions at sqrt(s)=200 GeV. United States: N. p., 2007. Web.
Awes, Terry C, Batsouli, Sotiria, Cianciolo, Vince, Efremenko, Yuri V, Plasil, F, Read Jr, Kenneth F, Silvermyr, David O, Sorensen, Soren P, Stankus, Paul W, Young, Glenn R, Zhang, Chun, & PHENIX, Collaboration. Measurement of Direct Photon Production in p+p Collisions at sqrt(s)=200 GeV. United States.
Awes, Terry C, Batsouli, Sotiria, Cianciolo, Vince, Efremenko, Yuri V, Plasil, F, Read Jr, Kenneth F, Silvermyr, David O, Sorensen, Soren P, Stankus, Paul W, Young, Glenn R, Zhang, Chun, and PHENIX, Collaboration. Mon . "Measurement of Direct Photon Production in p+p Collisions at sqrt(s)=200 GeV". United States. doi:.
@article{osti_932004,
title = {Measurement of Direct Photon Production in p+p Collisions at sqrt(s)=200 GeV},
author = {Awes, Terry C and Batsouli, Sotiria and Cianciolo, Vince and Efremenko, Yuri V and Plasil, F and Read Jr, Kenneth F and Silvermyr, David O and Sorensen, Soren P and Stankus, Paul W and Young, Glenn R and Zhang, Chun and PHENIX, Collaboration},
abstractNote = {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.},
doi = {},
journal = {Physical Review Letters},
number = 1,
volume = 98,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}