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arXiv 1909.09304nucl-thhep-phnucl-ex
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$\sqrt{s_{\mathrm{NN}}}$ = 5-200 GeV Au+Au碰撞轻核产生的JAM模型

Light Nuclei Production in Au+Au Collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5-200 GeV from JAM model

Hui Liu, Dingwei Zhang, Shu He, Kai-jia Sun, Ning Yu, Xiaofeng Luo

摘要:

轻核的产生对重子密度涨落很敏感,可以用来探测相对论性重离子碰撞中的QCD相变。本文利用输运模型(JAM)研究了$\sqrt{s_{\mathrm{NN}}}$ = 5,7.7,11.5,14.5,19.6,27,39,54.4,62.4和200 GeV的Au+Au中心碰撞中质子、氘核和triton的产生.基于轻核的并合产生,我们计算了快度密度$dN/dy$和粒子比($d/p$,$t/p$,$t/d$)的能量依赖关系.更重要的是,产额比$N_{t} \times N_{p} / N_{d}^{2}$,这是敏感的中子密度波动,显示出平坦的能量依赖性,不能描述的非单调趋势观察到的STAR实验。基于核子并合的理论,本文的工作为今后重离子碰撞实验中寻找QCD临界点和/或一级相变提供了约束和参考。

英文摘要:

Light nuclei production is sensitive to the baryon density fluctuations and can be used to probe the QCD phase transition in relativistic heavy-ion collisions. In this work, we studied the production of proton, deuteron, triton in central Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5, 7.7, 11.5, 14.5, 19.6, 27, 39, 54.4, 62.4 and 200 GeV from a transport model (JAM). Based on the coalescence production of light nuclei, we calculated the energy dependence of rapidity density $dN/dy$ and particle ratios ($d/p$, $t/p$, and $t/d$). More importantly, the yield ratio $N_{t} \times N_{p} / N_{d}^{2}$, which is sensitive to the neutron density fluctuations, shows a flat energy dependence and cannot describe the non-monotonic trend observed by the STAR experiment. Based on the nucleon coalescence, this work can provide constraint and reference to search for the QCD critical point and/or first order phase transition with light nuclei production in future heavy-ion collision experiments.

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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