We present a systematic study of transverse momentum (pT) spectra of charged particles in p + p and Xe +Xe collisions at sNN = 5.44 TeV. The published data of invariant yields of charged particles as a function of pT is taken from ALICE at LHC in the mid-pseudorapidity region |η| < 0.8. The modified form of Tsallis distribution is used here to analyze the pT spectra of charged particles. The power law of Tsallis/Hagedorn form gives very good description of the charged particle spectra in p + p collisions within a pT range of 0.15 GeV/c to 50 GeV/c. When we go from p + p collisions to heavy-ion (Xe +Xe) collisions, the original form of Tsallis/Hagedorn distribution is not able to describe the pT spectra of charged particles properly. This may be occurred due to the medium effects or the final state effects. Here we discuss two types of medium effects of charged particles in Xe +Xe collisions, one is the transverse flow in the low to intermediate pT region (pT ≤ 7 GeV/c) and the other is the energy loss in the high pT region (pT > 7 GeV/c), using the modified Tsallis distribution.

中文翻译：

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使用修正的 Tsallis 分布在 s NN = 5.44 TeV 时 Xe+Xe 碰撞中带电粒子的介质效应

我们对横向动量进行了系统研究(p吨)带电粒子的光谱p + p和氙 +氙碰撞在sññ = 5.44 TeV。已发表的带电粒子的不变产量数据作为以下函数的函数p吨取自 LHC 中伪快区域的 ALICE|η| < 0.8. 这里使用 Tsallis 分布的修正形式来分析p吨带电粒子的光谱。Tsallis/Hagedorn 形式的幂律很好地描述了带电粒子光谱p + p内的碰撞p吨范围为 0.15 GeV/C至 50 GeV/C. 当我们从p + p与重离子（Xe +Xe) 碰撞，Tsallis/Hagedorn 分布的原始形式无法描述p吨带电粒子的光谱。这可能是由于介质效应或最终状态效应而发生的。在这里，我们讨论了氙中带电粒子的两种介质效应 +Xe 碰撞，一种是低到中的横向流动p吨地区 （p吨 ≤ 7 GeV/C) 另一个是高能量损失p吨地区 （p吨 > 7 GeV/C)，使用修改后的 Tsallis 分布。