BARC/PUB/2005/0465

 
 

Centrality Dependence of Direct Photon Production in √SNN=200 GeV Au + Au Collisions

 
     
 
Author(s)

Adler, S. S.; Afanasiev, S.; Aidala, C.; Choudhury, R. K.; Chand, P.; Dutta, D.; Kapoor, S. S.; Mohanty, A. K.; and others
(PG)

Source

Physical Review Letters, 2005. Vol. 94: Article no. 232301

ABSTRACT

The first measurement of direct photons in Au+Au collisions at √sNN=200 GeV is presented. The direct photon signal is extracted as a function of the Au+Au collision centrality and compared to next-to- leading order perturbative quantum chromodynamics calculations. The direct photon yield is shown to scale with the number of nucleon-nucleon collisions for all centralities

 
 
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