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arXiv 2102.09993hep-phnucl-th
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玻璃体初始阶段涨落的演化

Evolution of initial stage fluctuations in the glasma

Pablo Guerrero-Rodríguez, Tuomas Lappi

摘要:

本文计算了有限适当时间重离子碰撞初始阶段中,在玻璃体中沉积的能量密度和轴向电荷的一点和两点关联函数。我们这样做是通过描述重离子碰撞的初始阶段的自由发展的经典领域的动力学服从线性化杨米尔斯方程。我们的方法使我们能够系统地恢复高动量模式的贡献,这将使幂级数展开在适当的时间发散。我们使用Glasma图近似来评估McLerran-Venugopalan模型中的场激励器,但是我们的时间依赖性方法可以应用于初始色场的一般四点函数。我们的结果提供了分析洞察预平衡阶段的重离子碰撞,而不需要一个数值解的杨米尔斯方程。

英文摘要:

We perform a calculation of the one- and two-point correlation functions of energy density and axial charge deposited in the glasma in the initial stage of a heavy ion collision at finite proper time. We do this by describing the initial stage of heavy ion collisions in terms of freely evolving classical fields whose dynamics obey the linearized Yang-Mills equations. Our approach allows us to systematically resum the contributions of high momentum modes that would make a power series expansion in proper time divergent. We evaluate the field correlators in the McLerran-Venugopalan model using the glasma graph approximation, but our approach for the time dependence can be applied to a general four-point function of the initial color fields. Our results provide analytical insight into the preequilibrium phase of heavy ion collisions without requiring a numerical solution to the Yang-Mills equations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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