相对论性核碰撞早期夸克的不饱和：热胶初始方案及其可观测特征
Undersaturation of quarks at early stages of relativistic nuclear collisions: the hot glue initial scenario and its observable signatures
摘要：
高多重数核碰撞的早期阶段是由一个几乎无夸克的、热的、解除束缚的纯胶子等离子体所代表的。这种新的情况的特点应该是高$p_T$光子和双轻子的抑制，以及减少重子介子比。本文采用含时夸克逸度的理想Bjorken流体力学方法，对LHC能区中心Pb+Pb碰撞进行了数值模拟。结果表明，在化学不饱和夸克-胶子等离子体的流体动力学演化过程中，产生了约25%的最终总熵.
英文摘要：
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 $p_T$ 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.
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