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Titolo: HOTSPOTS AND TURBULENT INITIAL CONDITIONS OF QUARKGLUON PLASMAS IN NUCLEAR COLLISIONS
Autore: GYULASSY M; RISCHKE DH; ZHANG B;
 Indirizzi:
 COLUMBIA UNIV,DEPT PHYS,PUPIN PHYS LABS,538 W 120TH ST NEW YORK NY 10027
 Titolo Testata:
 Nuclear physics. A
fascicolo: 4,
volume: 613,
anno: 1997,
pagine: 397  434
 SICI:
 03759474(1997)613:4<397:HATICO>2.0.ZU;2I
 Fonte:
 ISI
 Lingua:
 ENG
 Soggetto:
 HEAVYION COLLISIONS; FLUXCORRECTED TRANSPORT; PION INTERFEROMETRY; MONTECARLO; ENERGYLOSS; QCD; MODEL; EQUATION; STATE; FLUCTUATIONS;
 Keywords:
 RELATIVISTIC HEAVYION COLLISIONS; RELATIVISTIC FLUID DYNAMICS; PHASE TRANSITIONS; QUARKGLUON PLASMA; MINIJET PRODUCTION, TURBULENCE;
 Tipo documento:
 Article
 Natura:
 Periodico
 Settore Disciplinare:
 Science Citation Index Expanded
 Citazioni:
 65
 Recensione:
 Indirizzi per estratti:



 Citazione:
 M. Gyulassy et al., "HOTSPOTS AND TURBULENT INITIAL CONDITIONS OF QUARKGLUON PLASMAS IN NUCLEAR COLLISIONS", Nuclear physics. A, 613(4), 1997, pp. 397434
Abstract
As a result of multiple minijet production, initial conditions of the QCD plasma formed in ultrarelativistic nuclear collisions may be inhomogeneous, with large fluctuations of the local energy density (hot spots),and turbulent, with a chaotic initial transverse velocity field. Assuming rapid local thermalization, the evolution of such plasmas iscomputed using longitudinal boostinvariant (3+1)dimensional hydrodynamics. We compare the evolution in case that the speed of sound in the plasma is constant to one resulting from an equation of state involving a strong firstorder transition, with a minimum of the velocity ofsound as a function of energy density, We find that azimuthally asymmetric fluctuations and correlations of the transverse energy flow, dE(perpendicular to)/dy d phi, can develop in both cases due to the initial inhomogeneities. Hot spots also enhance significantly highk(perpendicular to) direct photon yields, In the case with a phase transition,the hadronization surface evolves into an unusual foamlike structure. Also in that case, we find that hadronization is considerably delayed relative to the ideal gas case, just as previous studies have found for homogeneous initial conditions. The timedelay signature of a rapid crossover transition region in the QCD equation of state (as observable via meson interferometry) is thus found to be remarkably robust to uncertainties in the initial conditions in heavyion reactions.
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Documento generato il 05/07/20 alle ore 03:14:45