论文标题
首次实施大型强子对撞机能量的重离子碰撞的横向球体分析
First implementation of transverse spherocity analysis for heavy-ion collisions at the Large Hadron Collider energies
论文作者
论文摘要
横向球体是可观察到的事件形状的，具有非常独特的能力，可以根据其几何形状（即码头和各向同性）分离事件。在这项工作中，我们使用多相传输模型（AMPT）首次使用横向球体。我们获得了横向动量光谱，综合产量，平均横向动量和方位角各向异性，用于Xe-Xe碰撞中鉴定的粒子，$ \ sqrt {s _ {\ rm {nn}}}} 5.02 $ TEV。在比较码头和各向同性事件的横向动量光谱时，可以清楚地看到重型离子碰撞中集体碰撞的指示。椭圆流作为横向球的函数表明，各向同性事件的椭圆流几乎为零，椭圆流主要由码头事件主导。这项研究将铺平一种方法，以重点在沉重离子碰撞中，以便以复杂的方式研究喷气媒体修饰和喷气式式辐射化学。
Transverse spherocity, an event shape observable, has a very unique capability to separate the events based on their geometrical shape, i.e. jetty and isotropic. In this work, we use transverse spherocity for the first time in heavy-ion collisions using A Multi-Phase Transport Model (AMPT). We obtain the transverse momentum spectra, integrated yield, mean transverse momentum and azimuthal anisotropy for identified particles in Xe-Xe collisions at $\sqrt{s_{\rm{NN}}} = 5.44$ TeV and Pb-Pb collisions at $\sqrt{s_{\rm{NN}}} = 5.02$ TeV. The indication of collectivity in heavy-ion collisions can be clearly seen while comparing the transverse momentum spectra from jetty and isotropic events. The elliptic flow as a function of transverse spherocity shows that the isotropic events have nearly zero elliptic flow and the elliptic flow is mostly dominated by the jetty events. This study will pave a way to focus on jetty events in heavy-ion collisions in order to investigate jet medium modification and jet hadro-chemistry in a sophisticated manner.
