STAR Results from the RHIC Beam Energy Scan

29th Winter Workshop on Nuclear Dynamics

Wang, Hui^1

RM 1-174, Building 510A, Brookhaven National Laboratory, Upton, 11973, NY, United States^1

关键词: Baryon chemical potential;    Beam energies;    First order transitions;    Gold nuclei;    Hadronic matters;    High temperature;    Qcd phase diagrams;    Quark-gluon plasma;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/458/1/012001/pdf
DOI  :  10.1088/1742-6596/458/1/012001

来源: IOP

【 摘 要 】

The collision of two gold nuclei at top RHIC energy ( √ sNN=200 GeV) creates a new phase of matter, the quark-gluon plasma (QGP). The QGP exists at very high temperatures, T, and low baryo-chemical potentials, μB. Both lattice QCD and experimental data indicate this transition from hadronic matter to Quark Gluon Plasma is an analytical transition (cross-over). On the other hand, systems formed at larger values of the baryo-chemical potential may undergo a first-order transition.Thus there can be an end point of the first-order transition on the QCD phase diagram, the critical point. To study the QCD phase boundary and search for the possible QCD critical point, RHIC launched a Beam Energy Scan Program. In 2010 and 2011, we collected data at √sNN=7.7, 11.5, 19.6, 27, 39 and 62.4 GeV, which covers a wide range of baryon chemical potential from μB 420 to 40 MeV. In this article, we will report the latest results of the Beam Energy Scan Program from the STAR collaboration.