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arXiv 0910.3547hep-phnucl-th
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多重数涨落和温度涨落

Multiplicity fluctuations and temperature fluctuations

Grzegorz Wilk, Zbigniew Wlodarczyk

摘要:

我们认为,在高能核碰撞中观察到的特定波动可以归因于在这样的过程中形成的强子化系统的温度的内在波动,因此可以描述由相同的nonextensivity参数$q$表征Tsallis统计描述这样的系统(对于$q \to 1$恢复通常的玻尔兹曼-吉布斯方法)。这意味着$|q-1|$是温度波动的直接度量,也可以用观测到的平均多重性$<N>$及其方差$Var(N)$表示。这允许从实验数据推导出系统的尺寸依赖性的参数$q$与$q = 1$对应于一个无限的,热化源与一个固定的温度,并与所观察到的$q > 1$对应于一个有限的源,其中的温度和能量波动。

英文摘要:

We argue that specific fluctuations observed in high-energy nuclear collisions can be attributed to intrinsic fluctuations of temperature of the hadronizing system formed in such processes and therefore can be described by the same nonextensivity parameter $q$ characterizing Tsallis statistics describing such systems (for $q \to 1$ one recovers the usual Boltzmann-Gibbs approach). It means that $|q-1|$, which is a direct measure of temperature fluctuations, can also be expressed by the observed mean multiplicity, $<N>$, and by its variance, $Var(N)$. This allows to deduce from the experimental data the system size dependence of parameter $q$ with $q = 1$ corresponding to an infinite, thermalized source with a fixed temperature, and with the observed $q > 1$ corresponding to a finite source in which both the temperature and energy fluctuate.

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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