标题： 通过测量非流系数探测LHC上相对论性p-O和O-O碰撞中的核结构 显示英文标题

标题： Probing nuclear structure in relativistic p-O and O-O collisions at the LHC through the measurement of anisotropic flow coefficients

摘要： RHIC和LHC计划注入$^{16}\rm O$核，重点研究集体效应以及小碰撞系统中夸克-胶子等离子体信号的起源。$^{16}\rm O$核被发现在核内存在$\alpha$粒子簇（$^{4}\rm He$）。本文中，我们研究了椭圆流（$v_2$）和三角流（$v_3$）这些对碰撞核的核几何敏感的各向异性流系数，分别针对p-O和O-O碰撞在$\sqrt{s_{\rm NN}}=9.61$TeV和7 TeV的情况。这项研究采用了一个包含IPGlasma + MUSIC + iSS + UrQMD的混合模型来完成。聚类核几何的结果与Woods-Saxon核轮廓进行了比较。同时探讨了初始状态和最终状态的各向异性。因此，这项研究是首次之一，它使用混合流体力学模型展示了p-O和O-O碰撞的各向异性流系数的研究。 我们发现在p-O中存在一个微小的$\alpha$聚集效应，而在O-O碰撞中则存在显著效应。 同样观察到，效应的幅度与$^{4}$氦的大小有关。 显示英文摘要

摘要： RHIC and LHC plan to inject $^{16}\rm O$ nuclei with a focus to investigate collectivity and the origin of quark-gluon plasma signatures in small collision systems. $^{16}\rm O$ nuclei is known to possess clusters of $\alpha$-particles ($^{4}\rm He$) inside the nucleus. In this paper, we study the anisotropic flow coefficients such as elliptic flow ($v_2$) and triangular flow ($v_3$), which are sensitive to the nuclear geometry of colliding nuclei, for p-O and O-O collisions at $\sqrt{s_{\rm NN}}=9.61$ TeV and 7 TeV respectively. The study is performed employing a hybrid model encompassing IPGlasma + MUSIC + iSS + UrQMD. The results of the clustered nuclear geometry are compared with those of the Woods-Saxon nuclear profile. Both initial and final state anisotropies are explored. This study is thus one of its first kind, where the study of anisotropic flow coefficients for p-O and O-O collisions is presented using a hybrid hydrodynamics model. We find a small effect of $\alpha$-clustering in p-O, while a significant one for O-O collisions. It is also observed that the magnitude of the effect correlates with the size of the $^{4}$He.