Nuclear Effects in Prompt Photon Production at the Large Hadron Collider

Details Nuclear Effects in Prompt Photon Production at the Large Hadron Collider Nuclear Effects in Prompt Photon Production at the Large Hadron Collider

2001-01-04

arxiv.org/abs/hep-ph/0101041v2

Nucl.Phys. A700 (2002) 523-538

Physics

High Energy Physics

High Energy Physics - Phenomenology

version accepted for publication in Nucl. Phys. A

Scientific paper

10.1016/S0375-9474(01)01309-4

We present a detailed study of prompt photon production cross section in heavy-ion collisions in the central rapidity region at energy of $\sqrt{s}=5.5$ TeV, appropriate to LHC experiment. We include the next-to-leading order radiative corrections, $O(\alpha_{em}\alpha_s^2)$, nuclear shadowing and the parton energy loss effects. We find that the nuclear effects can reduce the invariant cross section for prompt photon production by an order of magnitude at $p_t=3$ GeV. We discuss theoretical uncertainties due to parton energy loss and nuclear shadowing parameters. We show that the K-factor, which signifies the importance of next-to-leading order corrections, is large and has a strong $p_t$ dependence.

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