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Higher-order baryon number susceptibilities: Interplay between the chiral and the nuclear liquid-gas transitions

机译：高阶Baryon编号敏感性：手性和核液 - 气体过渡之间的相互作用

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摘要

We use an improved version of the SU(3) flavor parity-doublet quark-hadron model to investigate the higherorder baryon number susceptibilities near the chiral and the nuclear liquid-gas transitions. The parity-doublet model has been improved by adding higher-order interaction terms of the scalar fields in the effective mean field Lagrangian, resulting in a much-improved description of nuclear ground-state properties, in particular the nuclear compressibility. The resulting phase diagram of the model agrees qualitatively with expectations from lattice QCD, i.e., it shows a crossover at zero net baryochemical potential and a critical point at finite density. Using this model, we investigate the dependence of the higher-order baryon number susceptibilities as a function of temperature and chemical potential.We observe a strong interplay between the chiral and liquid-gas transition at intermediate baryochemical potentials. Due to this interplay between the chiral and the nuclear liquid-gas transitions, the experimentally measured cumulants of the net baryon number may show very different beam energy dependence, subject to the actual freeze-out temperature.
机译：我们使用Su（3）味奇偶频阶段夸克模型的改进版本来研究手性和核液 - 气体转变附近的高效骨折数量敏感性。通过在有效平均场拉格朗日中添加标量字段的高阶交互条款来改进了奇偶校验 - 双级模型，从而提高了核接地状态的更好描述，特别是核压缩性。该模型的所得到的相图与晶格QCD的期望进行了定性，即，它在零净化学化学潜力和有限密度下临界点表示交叉。使用该模型，我们研究了高阶Baryon数量敏感性的依赖性作为温度和化学潜力的函数。我们在中间化学化学潜力下观察手性和液气过渡之间的强烈相互作用。由于手性和核液体气体转变之间的相互作用，通过实际冻断温度，净骨折数的实验测量的净能量依赖性可能显示出非常不同的光束能量依赖性。

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  • 来源
    《Physical Review C》 |2017年第2017期|025205.1-025205.9|共9页
  • 作者

    A. Mukherjee; J. Steinheimer; S. Schramm;

  • 作者单位

    Frankfurt Institute for Advanced Studies Ruth-Moufang-Strasse 1 D-60438 Frankfurt am Main Germany Institut fuer Theoretische Physik Goethe Universitaet Frankfurt Max-von-Laue-Strasse 1 D-60438 Frankfurt am Main Germany;

    Frankfurt Institute for Advanced Studies Ruth-Moufang-Strasse 1 D-60438 Frankfurt am Main Germany;

    Frankfurt Institute for Advanced Studies Ruth-Moufang-Strasse 1 D-60438 Frankfurt am Main Germany Institut fuer Theoretische Physik Goethe Universitaet Frankfurt Max-von-Laue-Strasse 1 D-60438 Frankfurt am Main Germany;

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