Undersaturation of quarks at early stages of relativistic nuclear collisions: the hot glue initial scenario and its observable signatures
Stoecker, 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.
الأصل · EN
The early stage of high multiplicity nuclear collisions is represented by a nearly quarkless, hot, deconfined pure gluon plasma. This new scenario should be characterized by a suppression of high pₜ 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.
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