Local equilibrium in heavy-ion collisions: microscopic analysis of a central cell versus infinite matter

  • REVTEX, 27 pages incl. 10 figures and 3 tables; Phys. Rev. C (in press) Journal-ref: Phys.Rev. C62 (2000) 064906. We study the local equilibrium in the central V = 125 fm3 cell in heavy-ion collisions at energies from 10.7 A GeV (AGS) to 160 A GeV (SPS) calculated in the microscopic transport model. In the present paper the hadron yields and energy spectra in the cell are compared with those of infinite nuclear matter, as calculated within the same model. The agreement between the spectra in the two systems is established for times t >= 10 fm/c in the central cell. The cell results do not deviate noticeably from the infinite matter calculations with rising incident energy, in contrast to the apparent discrepancy with predictions of the statistical model (SM) of an ideal hadron gas. The entropy of this state is found to be very close to the maximum entropy, while hadron abundances and energy spectra differ significantly from those of the SM.

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Author:Larissa BravinaORCiDGND, Eugene E. ZabrodinORCiD, Steffen A. BassORCiDGND, Marcus BleicherORCiDGND, Mathias Brandstetter, Sven SoffORCiD, Horst StöckerORCiDGND, Walter GreinerGND
ArXiv Id:http://arxiv.org/abs/arXiv:nucl-th/0011011 v1
Document Type:Preprint
Year of Completion:2000
Year of first Publication:2000
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2005/04/13
Source:ArXiv nucl-th/0011011
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
PACS-Classification:20.00.00 NUCLEAR PHYSICS / 24.00.00 Nuclear reactions: general / 24.10.-i Nuclear reaction models and methods / 24.10.Lx Monte Carlo simulations (including hadron and parton cascades and string breaking models)
20.00.00 NUCLEAR PHYSICS / 24.00.00 Nuclear reactions: general / 24.10.-i Nuclear reaction models and methods / 24.10.Pa Thermal and statistical models
20.00.00 NUCLEAR PHYSICS / 25.00.00 Nuclear reactions: specific reactions / 25.75.-q Relativistic heavy-ion collisions (collisions induced by light ions studied to calibrate relativistic heavy-ion collisions should be classified under both 25.75.-q and sections 13 or 25 appropriate to the light ions)
Licence (German):License LogoDeutsches Urheberrecht