Nuclear effects in prompt photon production at the Large Hadron Collider

✍ Scribed by J. Jalilian-Marian; K. Orginos; I. Sarcevic

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 230 KB
• Volume: 700
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(01)01309-4

✦ Synopsis

We present a detailed study of prompt photon production cross section in heavy-ion collisions in the central rapidity region at energy of √ s = 5.5 TeV, appropriate to LHC experiment. We include the next-to-leading order radiative corrections, O(α em α 2 s ), nuclear shadowing and the parton energyloss 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.