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arXiv 2101.09490hep-ph
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高能物理中的查利斯统计:化学和热冻结

Tsallis Statistics in High Energy Physics: Chemical and Thermal Freeze-Outs

J. Cleymans, M. W. Paradza

摘要:

我们提出了一个相对论质子-质子($pp$)碰撞的建议,强调在Tsallis分布的框架内的热或动力学冻结阶段的概述。在本文中,我们考虑到化学势存在于Tsallis分布通过以下两个步骤的程序。在第一步中,我们使用了存在于变量中的冗余,例如系统温度$T$、体积$V$、Tsallis指数$q$、化学势$μ$,并通过有效地将化学势设置为零来执行所有拟合。在第二步骤中,值$q$保持固定在第一步骤中确定的值。这样,可以确定变量$T, q, V$和$μ$的完整集合。最终结果表明,在质量中心能量为$\sqrt{s}= 6$ GeV至13 TeV的$pp$碰撞中,能量依赖性较弱。动力学冻结时的化学势$μ$随束流能量的增加而增加。这简化了对$pp$碰撞中热冻结阶段的描述,因为$T$的值和冻结半径$R$的值在很宽的射束能量范围内仅轻微变化。

英文摘要:

We present an overview of a proposal in relativistic proton-proton ($pp$) collisions emphasizing the thermal or kinetic freeze-out stage in the framework of the Tsallis distribution. In this paper we take into account the chemical potential present in the Tsallis distribution by following a two step procedure. In the first step we used the redundancy present in the variables such as the system temperature, $T$, volume, $V$, Tsallis exponent, $q$, chemical potential, $μ$, and performed all fits by effectively setting to zero the chemical potential. In the second step the value $q$ is kept fixed at the value determined in the first step. This way the complete set of variables $T, q, V$ and $μ$ can be determined. The final results show a weak energy dependence in $pp$ collisions at the centre-of-mass energy $\sqrt{s}= 6$ GeV to 13 TeV. The chemical potential $μ$ at kinetic freeze-out shows an increase with beam energy. This simplifies the description of the thermal freeze-out stage in $pp$ collisions as the values of $T$ and of the freeze-out radius $R$ vary only mildly over a wide range of beam 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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