The measurement of particle correlations and fluctuations has been suggested as a method to search for the existence of a phase transition in relativistic heavy ion collisions. If quark-gluon matter is formed in the collision of relativistic heavy ions, measuring these correlations could lead to a determination of the presence of partonic degrees of freedom within the collision. Additionally, non-statistical fluctuations in global quantities such as baryon number, strangeness, or charge may be observed near a QCD critical point. Results for short and long-range multiplicity correlations (forward-backward) are presented for several systems (Au+Au and Cu+Cu) and energies (e.g. $\sqrt{s_{NN}}$ = 200, 62.4, and 22.4 GeV). For the highest energy central A+A collisions, the correlation strength maintains a constant value across the measurement region. In peripheral collisions, at lower energies, and in pp data, the maximum appears at midrapidity. Comparison to models with short-range (HIJING) and both short and long-range interactions (Parton String Model) do not fully reproduce central Au+Au data. Preliminary results for K/$π$ fluctuations are also shown as a function of centrality in Cu+Cu collisions at $\sqrt{s_{NN}}$ = 22.4 GeV.
Probing gluon fluctuations in nuclei with the first energy-dependent measurement of incoherent J/$ψ$ photoproduction in ultraperipheral PbPb collisions
Probing Gluon Linear Polarization with Dihadron Fragmentation in $χ_b$ Decays
Beijing University of Chemical Technology（北京化工大学）；Institute of High Energy Physics, Chinese Academy of Sciences（中国科学院高能物理研究所）；School of Physical Sciences, University of Chinese Academy of Sciences（中国科学院大学物理科学学院）；China Center of Advanced Science and Technology（中国科学技术中心）；Center for High Energy Physics, Peking University（北京大学高能物理中心）
Probing small Bjorken-$x$ nuclear gluonic structure via coherent J/$ψ$ photoproduction in ultraperipheral PbPb collisions at $\sqrt{s_\mathrm{NN}}$ = 5.02 TeV
Probing Early-Time Dynamics and Quark-Gluon Plasma Transport Properties with Photons and Hadrons
我们使用一个依赖于QCD有效动力学理论的混合模型-- K \oMP \oST --来动态地弥合IP核初始态和粘性流体力学之间的鸿沟，对重离子碰撞结果进行理论解释。流体动力学阶段之后是由UrQMD处理的动态冻结。据观察，新的预平衡/预水相不影响传输系数的提取。我们还展示了早期的动力学是如何反映在光子观测。
Probing gluon saturation with forward di-hadron correlations in proton-nucleus collisions
SUBATECH UMR 6457 (IMT Atlantique, Universite de Nantes, IN2P3/CNRS)（SUBATECH联合研究单位6457（大西洋理工大学，南特大学，法国国家科学研究中心））；University of California, Los Angeles（加州大学洛杉矶分校）；Mani L. Bhaumik Institute for Theoretical Physics, University of California, Los Angeles（加州大学洛杉矶分校马尼·L·巴乌米克理论物理研究所）；Center for Frontiers in Nuclear Science, Stony Brook University（纽约州立大学石溪分校核科学前沿中心）；Institute of Theoretical Physics, Jagiellonian University（雅盖隆大学理论物理研究所）；Department of Physics, Temple University（天普大学物理系）；RIKEN-BNL Research Center, Brookhaven National Laboratory（布鲁克海文国家实验室理研-BNL研究中心）；Physics Department, Brookhaven National Laboratory（布鲁克海文国家实验室物理系）；CFNS, Department of Physics and Astronomy, Stony Brook University（纽约州立大学石溪分校物理与天文学系核科学前沿中心）；Higgs Center for Theoretical Physics, The University of Edinburgh（爱丁堡大学希格斯理论物理中心）；Institute of Particle Physics and Key Laboratory of Quark and Lepton Physics（粒子物理研究所夸克和轻子物理重点实验室）
