Transition Radiation in QCD matter

Abstract

In ultrarelativistic heavy ion collisions a finite size QCD medium is created. In this paper we compute radiative energy loss to zeroth order in opacity by taking into account finite size effects. Transition radiation occurs on the boundary between the finite size medium and the vacuum, and we show that it lowers the difference between medium and vacuum zeroth order radiative energy loss relative to the infinite size medium case. Further, in all previous computations of light parton radiation to zeroth order in opacity, there was a divergence caused by the fact that the energy loss is infinite in the vacuum and finite in the QCD medium. We show that this infinite discontinuity is naturally regulated by including the transition radiation.

21 page, 22 figures

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Cited by in corpus (13)

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• The Surprising Transparency of the sQGP at LHC
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• Jet quenching
• Radiative heavy quark energy loss in a dynamical QCD medium
• The quark-gluon medium
• An overview of heavy quark energy loss puzzle at RHIC
• Jet suppression of pions and single electrons at Au+Au collisions at RHIC
• Probing the Frontiers of QCD
• Energy Loss of a Heavy Quark Produced in a Finite Size Medium
• Energy loss of a heavy quark produced in a finite-size quark-gluon plasma