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首页> 外文期刊>Physical review, C >Critical point of nuclear matter and beam-energy dependence of net-proton number fluctuations
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Critical point of nuclear matter and beam-energy dependence of net-proton number fluctuations

机译：Net-Proton数量波动的核物质和光束能量依赖性的临界点

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摘要

The beam energy dependence of net baryon number susceptibilities is studied in the framework of the hadron resonance gas model with the attractive and repulsive van der Waals interactions between baryons. The collision energy dependences for the skewness S sigma and kurtosis kappa sigma(2) deviate significantly from the Poisson baseline and demonstrate the existence of rich structures at moderate collision energies. This behavior may result from the critical end point of the nuclear liquid-gas first-order phase transition. Inparticular, kappa sigma(2) shows a nonmonotonic energy dependence, and, in contrast to the standard scenario for the QCD critical point, it does not decrease at low collision energies. It is also found that the measurable net proton fluctuations differ significantly from the net baryon fluctuations when interactions between baryons cannot be neglected. The results are compared with the experimental net proton number fluctuations measured by the STAR collaboration.
机译：在HOTRON共振气体模型的框架中研究了NET BANEON数量敏感性的光束能量依赖性，并在BARYONS之间的吸引力和令人厌恶的范德瓦尔斯相互作用。 抗斜肌和施经氏菌的碰撞能量依赖于泊松基线偏离泊松基线并展示了中等碰撞能量的富含结构的存在。 这种行为可能来自核液 - 气体一阶相转变的临界终点。 kappa sigma（2）显示非调制能量依赖性，与QCD关键点的标准场景相比，它在低碰撞能量下不会降低。 还发现，当不能忽视重子之间的相互作用时，可测量的净质子波动与净弯曲波动显着不同。 将结果与由星形协作测量的实验净质子数波动进行比较。

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