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Direct photon production in d+Au collisions at sqrt(s_NN)=200 GeV at midrapidity

Abstract : The differential cross section for the production of direct photons in p+p collisions at √s=200 GeV at midrapidity was measured in the PHENIX detector at the Relativistic Heavy Ion Collider. Inclusive direct photons were measured in the transverse momentum range from 5.5-25 GeV/c, extending the range beyond previous measurements. Event structure was studied with an isolation criterion. Next-to-leading-order perturbative-quantum-chromodynamics calculations give a good description of the spectrum. When the cross section is expressed versus xT, the PHENIX data are seen to be in agreement with measurements from other experiments at different center-of-mass energies.
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http://hal.in2p3.fr/in2p3-00723336
Contributor : Dominique Girod <>
Submitted on : Thursday, August 9, 2012 - 10:23:24 AM
Last modification on : Thursday, March 5, 2020 - 6:23:00 PM

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A. Adare, E. T. Atomssa, A. Baldisseri, H. Borel, Xavier Camard, et al.. Direct photon production in d+Au collisions at sqrt(s_NN)=200 GeV at midrapidity. Physical Review D, American Physical Society, 2012, 86, pp.072008. ⟨10.1103/PhysRevD.86.072008⟩. ⟨in2p3-00723336⟩

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