Under-saturation of quarks at early stages of relativistic nuclear collisions: The hot glue initial scenario and its observable signatures

作者：Stoecker H^*; Beitel M; Biro 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

来源：Astronomische Nachrichten, 2015, 336(8-9): 744-748.

DOI：10.1002/asna.201512252

• elementary particles
• glueball
• photon
• plasmas
• quark gluon

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.

• 出版日期2015-11
• 单位清华大学