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25 April 2024

» arxiv » 1509.7682

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Undersaturation of quarks at early stages of relativistic nuclear collisions: the hot glue initial scenario and its observable signatures
H. Stoecker ; M. Beitel ; T.S. Biró ; L.P. Csernai ; K. Gallmeister ; M.I. Gorenstein ; C. Greiner ; I.N. Mishustin ; M. Panero ; S. Raha ; L.M. Satarov ; S. Schramm ; F. Senzel ; B. Sinha ; J. Steinheimer ; J. Struckmeier ; V. Vovchenko ; Z. Xu ; K. Zhou ; P. Zhuang ;
Date:	25 Sep 2015
Abstract:	The early stage of high multiplicity nuclear collisions is represented by a nearly quarkless, hot, deconfined pure gluon plasma. These new scenario should be characterized by a suppression of high $p_T$ photons and dileptons as well as by reduced baryon to meson ratios. We present the numerical results for central Pb+Pb collisions at the LHC energies by using the ideal Bjorken hydrodynamics with time-dependent quark fugacity. It is shown that about 25\% of final total entropy is generated during the hydrodynamic evolution of chemically undersaturated quark-gluon plasma.
Source:	arXiv, 1509.7682
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