Transition to resonance-rich matter in heavy ion collisions at RHIC energies
- The equilibration of hot and dense nuclear matter produced in the central region in central Au+Au collisions at square root s = 200A GeV is studied within the microscopic transport model UrQMD. The pressure here becomes isotropic at t approx 5 fm/c. Within the next 15 fm/c the expansion of the matter proceeds almost isentropically with the entropy per baryon ratio S/A approx 150. During this period the equation of state in the (P, epsilon)-plane has a very simple form, P = 0.15 epsilon. Comparison with the statistical model (SM) of an ideal hadron gas reveals that the time of approx 20 fm/c may be too short to attain the fully equilibrated state. Particularly, the fractions of resonances are overpopulated in contrast to the SM values. The creation of such a long-lived resonance-rich state slows down the relaxation to chemical equilibrium and can be detected experimentally.
| Verfasserangaben: | Larissa BravinaORCiDGND, Eugene E. ZabrodinORCiD, Marcus BleicherORCiDGND, Steffen A. BassORCiDGND, Mathias Brandstetter, Amand FäßlerGND, Christian Fuchs, Walter GreinerGND, Mark I. GorensteinORCiDGND, Sven SoffORCiD, Horst StöckerORCiDGND |
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| URN: | urn:nbn:de:hebis:30-7137 |
| DOI: | https://doi.org/10.1088/0954-3899/27/3/321 |
| ISSN: | 1361-6471 |
| ISSN: | 0305-4616 |
| ArXiv-Id: | http://arxiv.org/abs/nucl-th/0010088v1 |
| Dokumentart: | Preprint |
| Sprache: | Englisch |
| Jahr der Fertigstellung: | 2000 |
| Datum der Erstveröffentlichung: | 26.10.2000 |
| Veröffentlichende Institution: | Universitätsbibliothek Johann Christian Senckenberg |
| Datum der Freischaltung: | 14.04.2005 |
| Seitenzahl: | 5 |
| Erste Seite: | 1 |
| Letzte Seite: | 5 |
| Bemerkung: | Später erschienen in: Journal of physics. G, Nuclear and particle physics, 27.2001, Nr. 3, Art. 421, doi:10.1088/0954-3899/27/3/321 |
| Quelle: | http://de.arxiv.org/abs/nucl-th/0010088 , Talk at the conference Strangeness'2000, to be published in J. of Phys. G |
| HeBIS-PPN: | 128802863 |
| Institute: | Physik / Physik |
| DDC-Klassifikation: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Lizenz (Deutsch): |  Deutsches Urheberrecht |
