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Under‐saturation of quarks at early stages of relativistic nuclear collisions: The hot glue initial scenario and its observable signatures
Author(s) -
Stöcker H.,
Beitel M.,
Biró T. S.,
Csernai L. P.,
Gallmeister K.,
Gorenstein M. I.,
Greiner C.,
Mishustin I. N.,
Panero M.,
Raha S.,
Satarov L. M.,
Schramm S.,
Senzel F.,
Sinha B.,
Steinheimer J.,
Struckmeier J.,
Vovchenko V.,
Xu Z.,
Zhou K.,
Zhuang P.
Publication year - 2015
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.201512252
Subject(s) - physics , quark–gluon plasma , observable , plasma , nuclear physics , large hadron collider , quark , baryon , meson , particle physics , quantum mechanics
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. (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)