Physics Colloquium of 4 May 2021

"tudy of QCD Phase Structure in High-Energy Nuclear Collisions: Selected results from RHIC beam energy scan program"
Nu Xu, LBNL

Since 2010, STAR Collaboration has been investigating the QCD phase structure, especially the search for QCD critical point, with the Beam Energy Scan (BES) program at the Relativistic Heavy Ion Collider (RHIC) in Brookhaven National Laboratory. Over a wide energy range from 3 GeV to 200 GeV Au+Au collisions, the RHIC BES program has recorded the world's most precise data. In this talk, I will present selected results from the first phase of the Beam Energy Scan with focus on collective dynamics and fluctuations in high-energy nuclear collisions. Physics implications of these results and future prospects, especially the QCD phase structure at the high baryon density region, will be discussed.

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One of ten national laboratories overseen and primarily funded by the Office of Science of the U.S. Department of Energy (DOE), Brookhaven National Laboratory conducts research in the physical, biomedical, and environmental sciences, as well as in energy technologies and national security. Brookhaven Lab also builds and operates major scientific facilities available to university, industry and government researchers. Brookhaven is operated and managed for DOE's Office of Science by Brookhaven Science Associates, a limited-liability company founded by the Research Foundation for the State University of New York on behalf of Stony Brook University, the largest academic user of Laboratory facilities, and Battelle, a nonprofit applied science and technology organization.

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