In this paper, we study temperature fluctuations in the initial stages of the relativistic heavy ion collision using a multiphase transport model. We consider the plasma in the initial stages after collision before it has a chance to equilibrate. We have considered Au + Au collision with a center-of-mass energy of 200 GeV. We use the nonextensive Tsallis statistics to find the entropic index in the partonic stages of the relativistic heavy ion collisions. We find that the temperature and the entropic index have a linear relationship during the partonic stages of the heavy ion collision. This has already been observed in the hadronic phase. A detailed analysis of the dependence of the entropic index on the system shows that for increasing spacetime rapidity, the entropic index of the partonic system increases. The entropic index also depends on the beam collision energy. The calculation of the entropic index from the experimental data fitting of the transverse momenta deals with the hadronic phase. However, our study shows that the behavior of the entropic index in the initial nonequilibrium stage of the collision is very similar to the behavior of the entropic index in the hadronic stage.

中文翻译：

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相对论重离子碰撞中的温度波动和 Tsallis 统计

在本文中，我们使用多相传输模型研究了相对论重离子碰撞初始阶段的温度波动。我们在碰撞后的初始阶段考虑等离子体，然后才有机会平衡。我们考虑过金 + 金碰撞的质心能量为 200 GeV。我们使用非广延 Tsallis 统计来找到相对论重离子碰撞的分子阶段的熵指数。我们发现，在重离子碰撞的分子阶段，温度和熵指数呈线性关系。这已经在强子阶段观察到了。对熵指数对系统依赖性的详细分析表明，随着时空速度的增加，分子系统的熵指数增加。熵指数还取决于光束碰撞能量。从横动量的实验数据拟合计算熵指数涉及强子相。然而，