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arXiv 1202.6646nucl-thhep-ph
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重离子碰撞中的涨落扰动初始条件和流动

Fluctuating Glasma initial conditions and flow in heavy ion collisions

Bjoern Schenke, Prithwish Tribedy, Raju Venugopalan

摘要:

在彩色玻璃凝聚体(CGC)框架下,将依赖于碰撞参量的饱和模型(IP-Sat)与经典的Yang-Mills初始粒子场描述相结合,计算了重离子碰撞的初始条件.除了核子位置的涨落外,这种IP-Ehrma描述还包括色荷在由反核饱和标度Q_s确定的长度标度上的量子涨落。该模型自然地产生由负二项分布描述的初始能量波动。三角形的偏心率的比率是接近的,在一个模型调整,以重现实验流量数据。利用相对论粘性流体动力学演化方法比较了不同初始条件模型下π介子的横动量谱和v_(2,3,4)(p_T)。

英文摘要:

We compute initial conditions in heavy-ion collisions within the Color Glass Condensate (CGC) framework by combining the impact parameter dependent saturation model (IP-Sat) with the classical Yang-Mills description of initial Glasma fields. In addition to fluctuations of nucleon positions, this IP-Glasma description includes quantum fluctuations of color charges on the length-scale determined by the inverse nuclear saturation scale Q_s. The model naturally produces initial energy fluctuations that are described by a negative binomial distribution. The ratio of triangularity to eccentricity is close to that in a model tuned to reproduce experimental flow data. We compare transverse momentum spectra and v_(2,3,4)(p_T) of pions from different models of initial conditions using relativistic viscous hydrodynamic evolution.

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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