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arXiv 1603.07375nucl-exnucl-th
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亚核子水平高能核碰撞的Glauber模型

Glauber modeling of high-energy nuclear collisions at sub-nucleon level

Constantin Loizides

摘要:

基于核子-核子相互作用的Glauber模型常用于描述高能核碰撞中的初始态,以及初始态的性质与碰撞参量或参与碰撞的核子数的关系。在本文中,一个扩展的Glauber模型,它占了任意数量的有效子核子自由度,或活性成分,在核子。初始状态的属性,如组成参与者和碰撞,以及偏心率和三角形的数量,计算和系统地比较不同的假设,如何分配的亚核自由度和各种碰撞系统。结果表明,在高碰撞能量下,产生的粒子数与亚核子自由度的平均数成比例关系,平均数介于$3$和$5$之间。源代码的组成蒙特卡洛Glauber扩展,以及计算的重叠面积和参与者密度在一个标准的Glauber模型,是公开的。

英文摘要:

Glauber models based on nucleon--nucleon interactions are commonly used to characterize the initial state in high-energy nuclear collisions, and the dependence of its properties on impact parameter or number of participating nucleons. In this paper, an extension to the Glauber model is presented, which accounts for an arbitrary number of effective sub-nucleon degrees of freedom, or active constituents, in the nucleons. Properties of the initial state, such as the number of constituent participants and collisions, as well as eccentricity and triangularity, are calculated and systematically compared for different assumptions of how to distribute the sub-nuclear degrees of freedom and for various collision systems. It is demonstrated that at high collision energy the number of produced particles scales with an average number of sub-nucleon degrees of freedom of between $3$ and $5$. The source codes for the constituent Monte Carlo Glauber extension, as well as for the calculation of the overlap area and participant density in a standard Glauber model, are made publicly available.

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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