非零磁场下QCD的相变和化学冻结
QCD Phase-transition and chemical freezeout in nonzero magnetic field at NICA
摘要：
由于带电观众的相对论偏心运动和参与者经历的局部动量不平衡，在高能碰撞中可能产生巨大的磁场。分析这种短寿命磁场对QCD相变的影响。从Polyakov线性西格玛模型出发，研究了手征性相变、磁响应和磁化率与温度、密度和磁场强度的关系。通过对不同相互作用系统和碰撞中心中ρ介子的涨落、动力学关联和介质内修正等相变特征信号的系统测量，揭示了对QCD相结构和化学冻结的几乎完整的描述。我们将讨论限制在NICA能量。
英文摘要：
Because of relativistic off-center motion of the charged spectators and the local momentum-imbalance experienced by the participants, a huge magnetic field is likely generated in high-energy collisions. The influence of such short-lived magnetic field on the QCD phase-transition(s) shall be analysed. From Polyakov linear-sigma model, we study the chiral phase-transition and the magnetic response and susceptibility in dependence on temperature, density and magnetic field strength. The systematic measurements of the phase-transition characterizing signals, such as the fluctuations, the dynamical correlations and the in-medium modifications of rho-meson, for instance, in different interacting systems and collision centralities are conjectured to reveal an almost complete description for the QCD phase-structure and the chemical freezeout. We limit the discussion to NICA energies.
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