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arXiv 1506.04285hep-ph
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重离子碰撞中带电粒子产生的两个分量

Two components in charged particle production in heavy-ion collisions

A. A. Bylinkin, N. S. Chernyavskaya, A. A. Rostovtsev

摘要:

本文采用最近提出的指数(“软”)和幂律(“硬”)函数形式相结合的双分量参数化方法,研究了重离子碰撞中带电粒子产生的横动量谱。分别计算出的带电强子密度与参与核子数$N_{part}$的关系曲线。得到的依赖关系进行了讨论,并建立了可能的联系,作者介绍的两个组件参数化和两个组件模型历史上用于重离子碰撞的情况下。其次,利用RHIC和LHC实验数据研究了该方法参数随质心能量和中心度的变化。的光谱形状被发现显示普遍依赖于$N_{part}$的所有调查的碰撞能量。

英文摘要:

Transverse momentum spectra of charged particle production in heavy-ion collisions are considered in terms of a recently introduced Two Component parameterization combining exponential ("soft") and power-law ("hard") functional forms. The charged hadron densities calculated separately for them are plotted versus number of participating nucleons, $N_{part}$. The obtained dependences are discussed and the possible link between the two component parameterization introduced by the authors and the two component model historically used for the case of heavy-ion collisions is established. Next, the variations of the parameters of the introduced approach with the center of mass energy and centrality are studied using the available data from RHIC and LHC experiments. The spectra shapes are found to show universal dependences on $N_{part}$ for all investigated collision energies.

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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