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arXiv 1909.07028nucl-exhep-ex
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在STAR上产生轻核（$d$，$t$）的能量依赖性

Energy Dependence of Light Nuclei ($d$, $t$) Production at STAR

Dingwei Zhang

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4 pages, 4 figures, Proceedings of 13th International Conference on Nucleus-Nucleus Collisions
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摘要：

在高能核碰撞中，轻核的产生对冻结时系统的温度和相空间密度很敏感。此外，从QGP到强子相的相变将导致较大的重子密度涨落，这将反映在轻核的产生上。例如，质子（$N(p)$）和Triton（$N(t)$）与氘核（$N(d)$）的产额之比，定义为$N(t)$ $\cdot$ $N(p)$ / $N^2(d)$，可以用作寻找QCD临界点的敏感观测量。本文报道了在RHIC的STAR实验中测量的$\sqrt{s_{NN}}$ =7.7，11.5，14.5，19.6，27，39，62.4和200 GeV的Au+Au碰撞中轻核（$d$，$t$）产生的能量依赖关系。我们将提出聚结参数$B_2(d)$和$B_3(t)$，粒子比（$d/p$，$t/p$和$t/d$），以及$N(t)$ $\cdot$ $N(p)$ / $N^2(d)$的产额比的束能量依赖性。我们将讨论它们的物理意义。

英文摘要：

In high-energy nuclear collisions, the production of light nuclei is sensitive to the temperature and phase-space density of the system at freeze-out. In addition, the phase transition from QGP to the hadronic phase will lead to large baryon density fluctuation, which will be reflected in the light nuclei production. For example, the ratio of proton ($N(p)$) and triton ($N(t)$) to deuteron ($N(d)$) yields, which is defined as $N(t)$$\cdot$$N(p)$/$N^2(d)$, may be used as a sensitive observable to search for the QCD critical point. In this paper, we will report the energy dependence of light nuclei ($d$, $t$) production in Au+Au collisions at $\sqrt{s_{NN}}$ =7.7, 11.5, 14.5, 19.6, 27, 39, 62.4, and 200 GeV measured by the STAR experiment at RHIC. We will present the beam energy dependence for the coalescence parameter $B_2(d)$ and $B_3(t)$, particle ratios ($d/p$, $t/p$, and $t/d$), and the yield ratio of $N(t)$$\cdot$$N(p)$/$N^2(d)$. Their physics implications will be discussed.

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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