arXiv 2005.142162020-05nucl-thhep-phnucl-ex

轻核的产生和QCD临界点的寻找

Light-nuclei production and search for the QCD critical point

Edward Shuryak, Juan M. Torres-Rincon

备注：: 7 pages, 3 figures. Typos fixed, explanations extended, figures improved, and new references added. Version published in Eur.Phys.J.A
发表信息：: The European Physical Journal A (2020) 56:241
DOI：: 10.1140/epja/s10050-020-00244-3

摘要：

本文讨论了在中能重离子碰撞中寻找QCD临界终点的轻核测量的可能性。先前基于中子密度涨落的提议已经带来了吸引人的实验证据，即在涉及到氚、质子和氘核的比率${\cal O}_{tpd}$中存在最大值。然而，这些结果是难以调和的国家的最先进的统计热模型预测。基于QCD临界点能导致核子间的吸引的观点，我们提出了新的包含$^4$ He的比率，其中最大值将更加明显。我们认为，实验提取是可行的，在低和高碰撞能量的实际测量。我们还说明了这些比率在中间能量应用半经典方法的基础上flucton路径使用初步的STAR数据${\cal O}_{tpd}$的可能行为。

英文摘要：

We discuss the potential of light-nuclei measurement in heavy-ion collisions at intermediate energies for the search of the hypothetical QCD critical end-point. A previous proposal based on neutron density fluctuations has brought appealing experimental evidences of a maximum in a ratio involving tritons, protons and deuterons, ${\cal O}_{tpd}$. However these results are difficult to reconcile with the state-of-the-art statistical thermal model predictions. Based on the idea that the QCD critical point can lead to a substantial attraction among nucleons, we propose new ratios involving $^4$He in which the maximum would be more evident. We argue that the experimental extraction is feasible by presenting actual measurements at low and high collision energies. We also illustrate the possible behavior of these ratios at intermediate energies applying the semiclassical method based on flucton paths using preliminary STAR data for ${\cal O}_{tpd}$.

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。

摘要：

英文摘要：

相关论文