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arXiv 1401.4835hep-ph
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LHC能区质子-质子碰撞的横动量分布和Tsallis热力学

Transverse Momentum Distributions in proton - proton Collisions at LHC Energies and Tsallis Thermodynamics

M. D. Azmi, J. Cleymans

摘要:

本文详细研究了LHC能区质子-质子碰撞中产生的带电粒子的横向动量分布。这是使用Tsallis分布的一个物理上一致的形式来完成的。所有使用的变量都是热力学的,特别是温度$T$遵循标准热力学定义,作为能量相对于(Tsallis)熵的导数。得到的末态粒子的动量分布很好地描述了粒子的横向动量分布。参数的值是由ALICE,ATLAS和CMS合作的测量确定的,并进行了详细讨论。特别是,Tsallis参数,$q$被发现与一致的值为所有的横向动量分布,尽管在运动学区域的差异很大,并显示出轻微的增加与光束能量,达到1.15在7 TeV的值。结果表明,高能p-p碰撞产生的强子系统服从Tsallis热力学。

英文摘要:

A detailed study of the transverse momentum distributions of charged particles produced in proton - proton collisions at LHC energies is presented. This is done using a thermodynamically consistent form of the Tsallis distribution. All variables used are thermodynamical and in particular, the temperature $T$ follows from the standard thermodynamic definition as being the derivative of the energy with respect to the (Tsallis) entropy. The momentum distribution of the final state particles obtained describe the transverse momentum distributions very well. The values of the parameters are determined from measurements by the ALICE, ATLAS and CMS collaborations and are discussed in detail. In particular, the Tsallis parameter, $q$ is found with consistent values for all the transverse momentum distributions despite large differences in kinematic regions and shows a slight increase with beam energy, reaching a value of 1.15 at 7 TeV. It is concluded that the hadronic system created in high-energy p - p collisions can be seen as obeying Tsallis thermodynamics.

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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