Direct photon production in p + p and Au + Au collisions at in the PACIAE model

A parton and hadron cascade model, PACIAE, is used in investigating the PHENIX data of the direct photon and pi(0) invariant differential cross sections in p + p collisions and the direct photon and pi(0) p(T) distributions in 0-10% of most central Au + Au collisions at top RHIC energy. It turns out that the above data are possible to be described by this microscopic transport model.

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