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Titolo:
THE TIME-DELAY SIGNATURE OF QUARK-GLUON PLASMA FORMATION IN RELATIVISTIC NUCLEAR COLLISIONS
Autore:
RISCHKE DH; GYULASSY M;
Indirizzi:
COLUMBIA UNIV,DEPT PHYS,PUPIN PHYS LABS,538 W 120TH ST NEW YORK NY 10027
Titolo Testata:
Nuclear physics. A
fascicolo: 4, volume: 608, anno: 1996,
pagine: 479 - 512
SICI:
0375-9474(1996)608:4<479:TTSOQP>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
HEAVY-ION COLLISIONS; QCD PHASE-TRANSITION; HIGH-ENERGY COLLISIONS; J-PSI-SUPPRESSION; PION INTERFEROMETRY; DILEPTON EMISSION; AU+AU COLLISIONS; TRANSVERSE-FLOW; HADRONIC GAS; MATTER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
61
Recensione:
Indirizzi per estratti:
Citazione:
D.H. Rischke e M. Gyulassy, "THE TIME-DELAY SIGNATURE OF QUARK-GLUON PLASMA FORMATION IN RELATIVISTIC NUCLEAR COLLISIONS", Nuclear physics. A, 608(4), 1996, pp. 479-512

Abstract

The hydrodynamic expansion of quark-gluon plasmas with spherical and longitudinally boost-invariant geometries is studied as a function of the initial energy density. The sensitivity of the collective flow pattern to uncertainties in the nuclear matter equation of state is explored. We concentrate on the effect of a possible finite width, Delta T similar to 0.1T(c), of the transition region between quark-gluon plasma and hadronic phase. Although slow deflagration solutions that act tostall the expansion do not exist for Delta T > 0.08T(c), we find, nevertheless, that the equation of state remains sufficiently soft in thetransition region to delay the propagation of ordinary rarefaction waves for a considerable time. We compute the dependence of the pion-interferometry correlation function on Delta T, since this is the most promising observable for time-delayed expansion. The signature of time delay, proposed by Pratt and Bertsch, is an enhancement of the ratio ofthe inverse width of the pion correlation function in out-direction to that in side-direction. One of our main results is that this genericsignature of quark-gluon plasma formation is rather robust to the uncertainties in the width of the transition region. Furthermore, for longitudinal boost-invariant geometries, the signal is likely to be maximized around RHIC energies, root s similar to 200A . GeV.

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Documento generato il 12/07/20 alle ore 05:56:07