Transverse pressure and strangeness dynamics in relativistic heavy-ion reactions
- Transverse hadron spectra from proton-proton, proton-nucleus and nucleus-nucleus collisions from 2 AGeV to 21.3 ATeV are investigated within two independent transport approaches (HSD and UrQMD). For central Au+Au (Pb+Pb) collisions at energies above E lab ~ 5 AGeV, the measured K +- transverse mass spectra have a larger inverse slope parameter than expected from the default calculations. The additional pressure - as suggested by lattice QCD calculations at finite quark chemical potential mu q and temperature T - might be generated by strong interactions in the early pre-hadronic/partonic phase of central Au+Au (Pb+Pb) collisions. This is supported by a non-monotonic energy dependence of v2/pT in the present transport model.
| Verfasserangaben: | Marcus BleicherORCiDGND, Elena L. BratkovskayaORCiDGND, Sascha VogelGND, Xianglei Zhu |
|---|---|
| URN: | urn:nbn:de:hebis:30-19854 |
| Dokumentart: | Preprint |
| Sprache: | Englisch |
| Datum der Veröffentlichung (online): | 27.10.2005 |
| Jahr der Erstveröffentlichung: | 2005 |
| Veröffentlichende Institution: | Universitätsbibliothek Johann Christian Senckenberg |
| Datum der Freischaltung: | 27.10.2005 |
| Quelle: | http://arxiv.org/abs/hep-ph/0503252; J. Phys. / G; Bd. 31 (2005), S709-S716; Proceedings of Strange Quark Matter 2004 |
| HeBIS-PPN: | 190440813 |
| Institute: | Physik / Physik |
| DDC-Klassifikation: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Lizenz (Deutsch): |  Deutsches Urheberrecht |
