arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1812.04524hep-phnucl-th
收藏

重离子碰撞中瞬发光子的几何标度

Geometrical scaling of prompt photons in heavy ion collisions

Michal Praszalowicz

摘要:

讨论了重离子碰撞中产生的瞬发(直接)光子的几何标度。为此,我们首先介绍了GS的概念,并说明它的带电粒子的例子出现。接下来,我们分析了RHIC和LHC的直接光子数据。我们发现,数据支持GS的假设,参与者数量与不同的中心性类。我们还研究了GS在不同的能量,但更详细的研究将是可能的,只有当数据至少有三个不同的能量从一个实验将是可用的,也当我们使用的数据从碰撞的大系统(铜+铜,金+金,铅+铅)和小系统(p+p,d+金,p+金)。

英文摘要:

We discuss geometrical scaling (GS) for the prompt (direct) photons produced in heavy ion collisions. To this end we first introduce the concept of GS and illustrate its emergence on the example of charged particles. Next, we analyse direct photon data from RHIC and from the LHC. We show that the data support the hypothesis of GS in terms of participant number related to different centrality classes. We also study GS at different energies, however a more detailed study will be possible only when data for at least three different energies from one experiment will be available and also when we use the data obtained from the collisions of large systems (Cu+Cu, Au+Au, Pb+Pb) and small systems (p+p, d+Au, p+Au).

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。

↑