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arXiv 1707.07552nucl-thhep-ph
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用HYDJET ++计算$\sqrt{s_{NN}}=193$ GeV上$U$ + $U$碰撞中强子的横向动量分布和椭圆流

Transverse Momentum Distribution and Elliptic Flow of Charged Hadrons in $U$+$U$ collisions at $\sqrt{s_{NN}}=193$ GeV using HYDJET++

Arpit Singh, P. K. Srivastava, O. S. K. Chaturvedi, S. Ahmad, B. K. Singh

摘要:

最近对$193$ GeV的$U+U$碰撞中带电强子性质的实验观察与包括双组分Monte Carlo Glauber模型在内的许多粒子产生的理论模型相矛盾。实验结果表明,带电强子的性质与初始几何构型(如体-体、尖-尖等)之间有很小的相关性。$U+U$冲突。本文对Monte Carlo HYDJET++模型进行了修正,研究了在$193$ GeV质心能量下,在尖-尖和体-体初始组态下,$U+U$碰撞中带电强子的产生.我们已经修改了硬以及软生产过程,使该模型适合$U+U$碰撞。本文计算了在$U+U$碰撞可能的各种几何组态中,不同控制参数的带电强子的赝快度分布、横动量分布和椭圆流分布。我们发现HYDJET++模型支持带电强子的各种性质与$U+U$碰撞的初始几何构型之间的微小关联。此外,在修正的HYDJET++模型($dn_{ch}/dη$和椭圆流模型($v_{2}$)中得到的结果与最小偏置位形下$U+U$碰撞的实验数据吻合较好.

英文摘要:

Recent experimental observations of the charged hadron properties in $U+U$ collisions at $193$ GeV contradict many of the theoretical models of particle production including two-component Monte Carlo Glauber model. The experimental results show a small correlation between the charged hadron properties and the initial geometrical configurations (e.g. body-body, tip-tip etc.) of $U+U$ collisions. In this article, we have modified the Monte Carlo HYDJET++ model to study the charged hadron production in $U+U$ collisions at $193$ GeV center-of-mass energy in tip-tip and body-body initial configurations. We have modified the hard as well as soft production processes to make this model suitable for $U+U$ collisions. We have calculated the pseudorapidity distribution, transverse momentum distribution and elliptic flow distribution of charged hadrons with different control parameters in various geometrical configurations possible for $U+U$ collision. We find that HYDJET++ model supports a small correlation between the various properties of charged hadrons and the initial geometrical configurations of $U+U$ collision. Further, the results obtained in modified HYDJET++ model regarding $dn_{ch}/dη$ and elliptic flow ($v_{2}$) suitably matches with the experimental data of $U+U$ collisions in minimum bias configuration.

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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