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Titolo:
Equation of state of resonance-rich matter in the central cell in heavy-ion collisions at root s=200A GeV - art. no. 064902
Autore:
Bravina, LV; Zabrodin, EE; Bass, SA; Bleicher, M; Brandstetter, M; Faessler, A; Fuchs, C; Greiner, W; Soff, S; Stocker, H;
Indirizzi:
Univ Tubingen, Inst Theoret Phys, D-72076 Tubingen, Germany Univ TubingenTubingen Germany D-72076 t Phys, D-72076 Tubingen, Germany Moscow State Univ, Inst Nucl Phys, RU-119899 Moscow, Russia Moscow State Univ Moscow Russia RU-119899 Phys, RU-119899 Moscow, Russia Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA Michigan State Univ E Lansing MI USA 48824 n Lab, E Lansing, MI 48824 USA Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA Univ Calif Berkeley Berkeley CA USA 94720 ucl Sci, Berkeley, CA 94720 USA Univ Frankfurt, Inst Theoret Phys, D-60325 Frankfurt, Germany Univ Frankfurt Frankfurt Germany D-60325 hys, D-60325 Frankfurt, Germany Gesell Schwerionenforsch, D-64220 Darmstadt, Germany Gesell Schwerionenforsch Darmstadt Germany D-64220 20 Darmstadt, Germany
Titolo Testata:
PHYSICAL REVIEW C
fascicolo: 6, volume: 6306, anno: 2001,
pagine: 4902 -
SICI:
0556-2813(200106)6306:6<4902:EOSORM>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
NUCLEUS-NUCLEUS COLLISIONS; QUANTUM MOLECULAR-DYNAMICS; FREEZE-OUT PARAMETERS; QUARK-GLUON PLASMA; PLUS PB COLLISIONS; CHEMICAL EQUILIBRATION; HADRONIC OBSERVABLES; THERMAL-ANALYSIS; GAS MODELS; 200A GEV;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
49
Recensione:
Indirizzi per estratti:
Indirizzo: Bravina, LV Univ Tubingen, Inst Theoret Phys, D-72076 Tubingen, Germany Univ Tubingen Tubingen Germany D-72076 076 Tubingen, Germany
Citazione:
L.V. Bravina et al., "Equation of state of resonance-rich matter in the central cell in heavy-ion collisions at root s=200A GeV - art. no. 064902", PHYS REV C, 6306(6), 2001, pp. 4902

Abstract

The equilibration of hot and dense nuclear matter produced in the central cell of central Au + Au collisions at roots = 200A GeV is studied within a microscopic transport model. The pressure in the cell becomes isotropic at t approximate to 5 fm/c after beginning of the collision. Within the next 15 fm/c the expansion of matter in the cell proceeds almost isentropically with the entropy per baryon ratio S/A congruent to 150, and the equation of state in the (P,epsilon) plane has a very simple form, P = 0.15 epsilon. Comparison with the statistical model of an ideal hadron gas indicates that the time t approximate to 20 fm/c may be too short to reach the fully equilibrated state. Particularly, the creation of long-lived resonance-rich matter in the cell decelerates the relaxation to chemical equilibrium. This resonance-abundant state can be detected experimentally after the thermal freeze out of particles.

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Documento generato il 09/04/20 alle ore 19:59:03