Prompt photons at RHIC

Details Prompt photons at RHIC Prompt photons at RHIC

2000-10-19

arxiv.org/abs/hep-ph/0010230v2

Phys.Rev. C63 (2001) 041901

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 5 figures, expanded discussion of the K factor

Scientific paper

10.1103/PhysRevC.63.041901

We calculate the inclusive cross section for prompt photon production in heavy-ion collisions at RHIC energies ($\sqrt{s}=130$ GeV and $\sqrt{s}=200$ GeV) in the central rapidity region including next-to-leading order, $O(\alpha_{em}\alpha_s^2)$, radiative corrections, initial state nuclear shadowing and parton energy loss effects. We show that there is a significant suppression of the nuclear cross section, up to $\sim 30%$ at $\sqrt{s}=200$ GeV, due to shadowing and medium induced parton energy loss effects. We find that the next-to-leading order contributions are large and have a strong $p_t$ dependence.

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