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Equation of state of resonance-rich matter in the central cell in heavy-ion collisions at $\sqrt{s}$=200 AGeV

Publication ,  Journal Article
Bravina, LV; Zabrodin, EE; Bass, SA; Bleicher, M; Brandstetter, M; Faessler, A; Fuchs, C; Greiner, W; Soff, S; Stoecker, H
Published in: Phys. Rev. C
2001
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The equilibration of hot and dense nuclear matter produced in the central cell of central Au+Au collisions at RHIC ($\sqrt{s}=200$ AGeV) energies is studied within a microscopic transport model. The pressure in the cell becomes isotropic at $t\approx 5$ 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 $S/A \approx 150$, 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 $t \approx 20$ 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.

Duke Scholars

Steffen A. Bass
Author Steffen A. Bass Physics

Published In

Phys. Rev. C

Publication Date

2001

Volume

63

Start / End Page

064902

Related Subject Headings

  • Nuclear & Particles Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
 

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Bravina, L. V., Zabrodin, E. E., Bass, S. A., Bleicher, M., Brandstetter, M., Faessler, A., … Stoecker, H. (2001). Equation of state of resonance-rich matter in the central cell in heavy-ion collisions at $\sqrt{s}$=200 AGeV. Phys. Rev. C, 63, 064902.
Bravina, L. V., E. E. Zabrodin, S. A. Bass, M. Bleicher, M. Brandstetter, A. Faessler, C. Fuchs, W. Greiner, S. Soff, and H. Stoecker. “Equation of state of resonance-rich matter in the central cell in heavy-ion collisions at $\sqrt{s}$=200 AGeV.” Phys. Rev. C 63 (2001): 064902.
Bravina LV, Zabrodin EE, Bass SA, Bleicher M, Brandstetter M, Faessler A, et al. Equation of state of resonance-rich matter in the central cell in heavy-ion collisions at $\sqrt{s}$=200 AGeV. Phys Rev C. 2001;63:064902.
Bravina LV, Zabrodin EE, Bass SA, Bleicher M, Brandstetter M, Faessler A, Fuchs C, Greiner W, Soff S, Stoecker H. Equation of state of resonance-rich matter in the central cell in heavy-ion collisions at $\sqrt{s}$=200 AGeV. Phys Rev C. 2001;63:064902.

Published In

Phys. Rev. C

Publication Date

2001

Volume

63

Start / End Page

064902

Related Subject Headings

  • Nuclear & Particles Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics