Enhanced Production of Direct Photons in Au plus Au Collisions at root s(NN)=200 GeV and Implications for the Initial Temperature

@article{Adare2010EnhancedPO,
  title={Enhanced Production of Direct Photons in Au plus Au Collisions at root s(NN)=200 GeV and Implications for the Initial Temperature},
  author={T. P. C. A. Adare and E. al.},
  journal={Physical Review Letters},
  year={2010},
  volume={104},
  pages={132301-132301}
}
  • T. P. C. A. Adare, E. al.
  • Published 2010
  • Physics
  • Physical Review Letters
  • The production of e(+)e(-) pairs for m(e+e-) < 0.3 GeV/c(2) and 1< p(T) < 5 GeV/c is measured in p + p and Au + Au collisions at root s(NN) = 200 GeV. An enhanced yield above hadronic sources is observed. Treating the excess as photon internal conversions, the invariant yield of direct photons is deduced. In central Au + Au collisions, the excess of the direct photon yield over p + p is exponential in transverse momentum, with an inverse slope T = 221 +/- 19(stat) +/- 19(syst) MeV… CONTINUE READING
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