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Centrality dependence of inclusive prompt photon production in d+Au, Au+Au, p+Pb, and Pb+Pb collisions

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Abstract

We calculate the centrality dependence of the midrapidity nuclear modification for inclusive prompt photon production in d+Au and Au+Au collisions at RHIC and in p+Pb and Pb+Pb collisions at the LHC. Our results, using the recent spatially dependent nuclear PDF set EPS09s, are consistent with the existing high-p T data from the PHENIX and CMS collaborations. The good agreement even in the case of nucleus+nucleus collisions suggests that the high-p T direct photon production is not significantly altered by the strongly interacting medium produced in such collisions. We find the centrality dependence of the nuclear modifications generally rather weak but perhaps measurable at low p T .

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Authors and Affiliations

  1. Department of Physics, University of Jyväskylä, P.O. Box 35, FI-40014, Jyväskylä, Finland

    Ilkka Helenius, Kari J. Eskola & Hannu Paukkunen

  2. Helsinki Institute of Physics, University of Helsinki, P.O. Box 64, FIN-00014, Helsinki, Finland

    Ilkka Helenius, Kari J. Eskola & Hannu Paukkunen

Authors
  1. Ilkka Helenius
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  2. Kari J. Eskola
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  3. Hannu Paukkunen
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Correspondence to Ilkka Helenius.

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ArXiv ePrint: 1302.5580

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Helenius, I., Eskola, K.J. & Paukkunen, H. Centrality dependence of inclusive prompt photon production in d+Au, Au+Au, p+Pb, and Pb+Pb collisions. J. High Energ. Phys. 2013, 30 (2013). https://doi.org/10.1007/JHEP05(2013)030

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  • DOI: https://doi.org/10.1007/JHEP05(2013)030

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