非线性扰动在QCD临界点附近的命运
The fate of nonlinear perturbations near the QCD critical point
摘要：
研究了QCD临界点对非线性波传播的影响。的影响已被调查的范围内的二阶因果耗散流体动力学纳入临界点的状态方程，以及输运系数和热力学响应函数的标度行为。在临界点附近，非线性波被明显阻尼，这可能导致远离侧喷流的马赫锥效应消失。这种阻尼可能会导致椭圆和更高的流量系数的波动增强。因此，在逐事件分析中马赫锥效应的消失和流动谐波波动的增强可以被认为是临界终点的信号。
英文摘要：
The impact of the QCD critical point on the propagation of nonlinear waves has been studied. The effects have been investigated within the scope of second-order causal dissipative hydrodynamics by incorporating the critical point into the equation of state, and the scaling behaviour of transport coefficients and of thermodynamic response functions. Near the critical point, the nonlinear waves are found to be significantly damped which may result in the disappearance of the Mach cone effects of the away side jet. Such damping may lead to enhancement in the fluctuations of elliptic and higher flow coefficients. Therefore, the disappearance of Mach cone effects and the enhancement of fluctuations in flow harmonics in the event-by-event analysis may be considered as signals of the critical endpoint.
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