论文标题
光核生产并寻找QCD关键点
Light-nuclei production and search for the QCD critical point
论文作者
论文摘要
我们讨论了在中间能量的重离子碰撞中光核测量的潜力，以搜索假设的QCD临界终点。先前基于中子密度波动的提案带来了涉及Triton，质子和杜特龙的最大比率的实验证据，$ {\ cal o} _ {tpd} $。但是，这些结果很难与最先进的统计热模型预测相吻合。基于QCD临界点可以导致核子具有实质吸引力的想法，我们提出了涉及$^4 $ HE的新比例，其中最大值将更加明显。我们认为，通过在低碰撞和高碰撞能量下提出实际测量值是可行的。我们还说明了使用$ {\ cal o} _ {tpd} $的初步星数据基于波动路径，基于波动路径的中间能量的这些比率的可能行为。
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 ${\cal O}_{tpd}$.
