摘要：

Understanding the properties of quark matter and its phase structure can enhance our knowledge of universe evolution and the structure of visible matters. In the last two decades, many experimental evidences for the strongly interacting quark-gluon plasma (sQGP) have been observed in high energy heavy-ion collisions. Therefore, exploring the QCD phase structure at high baryon density, such as mapping the 1st order phase boundary and finding the QCD critical point, becomes one of the most important goals of the heavy-ion collisions. During 2010-2017, RHIC has finished the first phase of Beam Energy Scan program (BES-I), and STAR experiment has collected the data of Au+Au collisions at various collision energies from 200 to 7.7 GeV. To confirm the intriguing observations at BES-I, RHIC has started the second phase of beam energy scan program (BES-II) since 2018, focusing on the energies below 27 GeV. From 2018 to 2020, STAR experiment has taken the data of high statistics Au+Au collision at 9.2, 11.5, 14.6, 19.6 and 27 GeV (collider mode) and 3.0 - 7.7 GeV (fixed target mode). In this talk, I will give a review on the experimental progress for exploring the QCD phase structure at RHIC-STAR experiment, especially focusing on the QCD critical point search. New facilities aiming for high baryon density region and future plan will be also discussed.

报告人简介：

罗晓峰，华中师范大学物理学院粒子物理研究所 教授、博士生导师。本科(2002-2006)、博士(2006-2011)毕业于中国科学技术大学近代物理系。攻读博士期间在美国劳伦斯伯克利国家实验室联合培养两年。2011年博士毕业被引进华中师大做师资博后，2013年留校聘为副教授, 2019年晋升为教授。先后在美国劳伦斯伯克利国家实验室（2015）、日本筑波大学(2016)、加州大学洛杉矶分校(16-17)做访问学者。参与美国RHIC/STAR以及德国FAIR/CBM国际实验， 专注于高能重离子碰撞中QCD相结构及寻找QCD临界点的实验研究。作为主要贡献者之一，首次在金金碰撞中观测到净质子数高阶涨落对碰撞能量的非单调依赖,为确定临界点提供重要实验依据。与美、印合作者确定出QCD相图的标度，发表在Science，被国际知名英国科学网站《Physics World》评为“2011年度国际物理十大突破”。至今发表论文50余篇, 被引2200余次, 单篇最高引用440次。2018年获首届美国布鲁克海文国家实验室Merit Award。 2012年“晨光杯”中国高能物理学会青年优秀论文一等奖。 现为RHIC/STAR国际实验合作组涨落与关联物理分析召集人, FAIR/CBM国际实验合作组理事成员，中国高能核物理网络论坛组委会成员。

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