Jet quenching as a probe of the phases of QCD in relativistic nuclear collisions

Journal Article · Thu Nov 15 04:00:00 EST 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.76.054902· OSTI ID:21067914

Tarasov, Yu A ^[1]

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1. Russian Research Center 'Kurchatov Institute', RU-123182, Moscow (Russian Federation)

We investigate the energy loss of gluon and quark jets in quark-gluon plasma produced in central Au+Au collisions at RHIC energy ({radical}(s{sub NN})=200 GeV). We use the effective quasiparticle model for investigation of physical characteristics of initial and mixed phases in expanding plasma. In the present work we calculate the quenching weight, i.e., the probability of medium-induced gluon radiation. We show that suppression of {pi}{sup 0} spectra is described correctly by quasiparticle model with increase of running coupling in the region of phase transition (at T{yields}T{sub c} from above) in agreement with recent lattice calculations and with PHENIX data. We show also that quasiparticle model with decrease of running coupling close to phase transition does not give correct description of this suppression.

• OSTI ID: 21067914
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 5 Vol. 76; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BROOKHAVEN RHIC
COUPLING
ENERGY LOSSES
GEV RANGE
GLUONS
GOLD 197 REACTIONS
GOLD 197 TARGET
JET MODEL
PHASE TRANSFORMATIONS
PIONS NEUTRAL
PROBABILITY
QUANTUM CHROMODYNAMICS
QUARK MATTER
QUARKS
QUENCHING
RELATIVISTIC RANGE