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Title: PHENIX Measurements of Reaction Plane Dependence of High-p T Photons and Pions

Abstract

Direct photon and neutral pion production with respect to the reaction plane at high-p{sub T} were measured with the PHENIX experiment in Au+Au collisions at {radical}s{sub NN}=200 GeV at mid-rapidity. The azimuthal asymmetry parameter v{sub 2} for direct photons was found to be consistent with zero for all centrality classes. We evaluate the dependence of {pi}{sub 0} suppression at high-p{sub T} on the emission angle {Delta}{phi} with respect to the event reaction plane for seven centrality bins. For the peripheral bins we observe no suppression for neutral pions aligned with the reaction plane while {pi}{sup 0}'s produced perpendicular to the reaction plane are suppressed by factor 2. We found that a simple geometric picture can explain the observed suppression pattern.

Authors:
 [1];  [2];  [3];  [2];  [3];  [2];  [2];  [4];  [2];  [2];  [3];  [5]
  1. University of Stony Brook, New York
  2. ORNL
  3. University of Tennessee, Knoxville (UTK) & Oak Ridge National Laboratory (ORNL)
  4. University of Tennessee, Knoxville (UTK)
  5. The
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
931208
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: 19th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions: Quark Matter 2006, Shanghai, China, 20061114, 20061120
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; PHOTONS; PIONS; PRODUCTION; QUARK MATTER; COLLISIONS; TRANSVERSE MOMENTUM

Citation Formats

Pantuev, V. S., Awes, Terry C, Batsouli, Sotiria, Cianciolo, Vince, Efremenko, Yuri, Read Jr, Kenneth F, Silvermyr, David O, Sorensen, Soren P, Stankus, Paul W, Young, Glenn R, Zhang, Chun, and PHENIX, Collaboration. PHENIX Measurements of Reaction Plane Dependence of High-pT Photons and Pions. United States: N. p., 2007. Web.
Pantuev, V. S., Awes, Terry C, Batsouli, Sotiria, Cianciolo, Vince, Efremenko, Yuri, Read Jr, Kenneth F, Silvermyr, David O, Sorensen, Soren P, Stankus, Paul W, Young, Glenn R, Zhang, Chun, & PHENIX, Collaboration. PHENIX Measurements of Reaction Plane Dependence of High-pT Photons and Pions. United States.
Pantuev, V. S., Awes, Terry C, Batsouli, Sotiria, Cianciolo, Vince, Efremenko, Yuri, Read Jr, Kenneth F, Silvermyr, David O, Sorensen, Soren P, Stankus, Paul W, Young, Glenn R, Zhang, Chun, and PHENIX, Collaboration. Mon . "PHENIX Measurements of Reaction Plane Dependence of High-pT Photons and Pions". United States. doi:.
@article{osti_931208,
title = {PHENIX Measurements of Reaction Plane Dependence of High-pT Photons and Pions},
author = {Pantuev, V. S. and Awes, Terry C and Batsouli, Sotiria and Cianciolo, Vince and Efremenko, Yuri 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 = {Direct photon and neutral pion production with respect to the reaction plane at high-p{sub T} were measured with the PHENIX experiment in Au+Au collisions at {radical}s{sub NN}=200 GeV at mid-rapidity. The azimuthal asymmetry parameter v{sub 2} for direct photons was found to be consistent with zero for all centrality classes. We evaluate the dependence of {pi}{sub 0} suppression at high-p{sub T} on the emission angle {Delta}{phi} with respect to the event reaction plane for seven centrality bins. For the peripheral bins we observe no suppression for neutral pions aligned with the reaction plane while {pi}{sup 0}'s produced perpendicular to the reaction plane are suppressed by factor 2. We found that a simple geometric picture can explain the observed suppression pattern.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

Conference:
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