Tea Time学术活动系列邀请报告(176)

　　题  目：Collectivity & QGP signals in Large and Small systems

　　主讲人：赵文彬助理研究员 （华中师范大学）

　　时  间：2021年4月21日 14:40-15:20

　　地  点：理学院 1-401物理学科会议室

　　报告内容：

　　In this talk, I will first talk about the hydrodynamic collectivity at low for p+p collisions and the coalescence model calculations for the NCQ scaling of  at intermediate  for the p+Pb collisions. For p+p collisions, iEBE-VISHNU hybrid model can describe the measured 2-particle correlations. However, hydro calculation shows positive 4-particle cumulant  and cannot reproduce the negative  measured in experiment. For the quark coalescence model calculations for the NCQ scaling, our coalescence model calculations smoothly connect with the low  hydrodynamic calculation and high  jet fragmentation. We present a nice description of the spectra and elliptic flow over the  range from 0 to 6 GeV, and obtain the approximately NCQ scaling at intermediate  as measured in experiment. We also demonstrate the importance of the partonic degree of freedom and indicate the possible formation of QGP in the high multiplicity p+Pb collisions.

　　Then I will also talk about the  and  in Pb+Pb collisions at 5.02 TeV. We use the Coupled Linearized Boltzmann Transport and Hydrodynamic （CoLBT-Hydro） model, with the Cooper-Frye, quark coalescence and fragmentation hadronizations scenario. For the first time, we can consistently describe and understand the experimental data on  and  along with their flavor dependence and hadron chemistry （proton-to-pion and kaon-to-pion ratios） from low to intermediate  and high  in high-energy heavy-ion collisions.

　　主讲人简介：

　　赵文彬，华中师范大学，科研助理。2020年7月博士毕业于北京大学。2020年9月至今为华中师范大学科研助理。研究方向为相对论重离子碰撞和小系统中的流体力学行为，夸克重组合模型和中间横动量区间的组分夸克标度律和轻核的产生。