Theoretical formalism of radiative jet energy loss in a finite size dynamical QCD medium

Journal Article · Tue Dec 15 04:00:00 EST 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.80.064909· OSTI ID:21296617

Djordjevic, Magdalena ^[1]

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1. Department of Chemistry and Physics, Arkansas State University, State University, Arkansas 72467 (United States) and Physics Department, Ohio State University, Columbus, Ohio 43210 (United States)

The computation of radiative energy loss in a finite-size QCD medium with dynamical constituents is a key ingredient for obtaining reliable predictions for jet quenching in ultrarelativistic heavy-ion collisions. We here present a theoretical formalism for the calculation of the first order in opacity radiative energy loss of a quark jet traveling through a finite-size dynamical QCD medium. We show that, while each individual contribution to the energy loss is infrared divergent, the divergence is naturally regulated once all diagrams are taken into account. Finite-size effects are shown to induce a nonlinear path-length dependence of the energy loss, recovering both the incoherent Gunion-Bertsch limit, as well as destructive Landau-Pomeanchuk-Migdal limit. Finally, our results suggest a remarkably simple general mapping between energy-loss expressions for static and dynamical QCD media.

• OSTI ID: 21296617
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 6 Vol. 80; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COMPUTER CALCULATIONS
ENERGY LOSSES
FORECASTING
HEAVY ION REACTIONS
NONLINEAR PROBLEMS
OPACITY
QUANTUM CHROMODYNAMICS
QUARKS
QUENCHING
RELATIVISTIC RANGE
SIMULATION