Excitation function of energy density and partonic degrees of freedom in relativistic heavy ion collisions

  • We estimate the energy density epsilon pile-up at mid-rapidity in central Pb+Pb collisions from 2 200 GeV/nucleon. epsilon is decomposed into hadronic and partonic contributions. A detailed analysis of the collision dynamics in the framework of a microscopic transport model shows the importance of partonic degrees of freedom and rescattering of leading (di)quarks in the early phase of the reaction for Elab 30 GeV/nucleon. In Pb+Pb collisions at 160 GeV/nucleon the energy density reaches up to 4 GeV/fm3, 95% of which are contained in partonic degrees of freedom.

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Author:H. Weber, Christoph Ernst, Marcus BleicherORCiDGND, Larissa BravinaORCiDGND, Horst StöckerORCiDGND, Walter GreinerGND, Christian Spieles, Steffen A. BassORCiDGND
Document Type:Preprint
Date of Publication (online):2005/12/09
Year of first Publication:1998
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2005/12/09
Tag:Energie; Kollisionen schwerer Ionen; Quark Gluon Plasma
QGP; Quark Gluon Plasma; energy; heavy ion collisions
Source:Phys.Lett.B442:443-448,1998, http://www.arxiv.org/abs/nucl-th/9808021 Version 2
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht