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.
Author: | Marcus BleicherORCiDGND, Elena L. BratkovskayaORCiDGND, Sascha VogelGND, Xianglei ZhuORCiD |
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URN: | urn:nbn:de:hebis:30-19854 |
Document Type: | Preprint |
Language: | English |
Date of Publication (online): | 2005/10/27 |
Year of first Publication: | 2005 |
Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
Release Date: | 2005/10/27 |
Source: | http://arxiv.org/abs/hep-ph/0503252; J. Phys. / G; Bd. 31 (2005), S709-S716; Proceedings of Strange Quark Matter 2004 |
HeBIS-PPN: | 190440813 |
Institutes: | Physik / Physik |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
Licence (German): | Deutsches Urheberrecht |