Evidence for the onset of deconfinement from longitudinal momentum distributions? : Observation of the softest point of the equation of state
- We analyze longitudinal pion spectra from E_lab= 2AGeV to sqrt s_NN=200GeV within Landau's hydrodynamical model. From the measured data on the widths of the pion rapidity spectra, we extract the sound velocity c_s in the early stage of the reactions. It is found that the sound velocity has a local minimum (indicating a softest point in the equation of state, EoS) at E_beam=30AGeV. This softening of the EoS is compatible with the assumption of the formation of a mixed phase at the onset of deconfinement.
Author: | Marcus BleicherORCiDGND |
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URN: | urn:nbn:de:hebis:30-19722 |
ArXiv Id: | http://arxiv.org/abs/hep-ph/0509314 |
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 |
HeBIS-PPN: | 190627700 |
Institutes: | Physik / Physik |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
Licence (German): | ![]() |