Speaker
Description
In the study of QCD phase structure and search of the QCD phase boundary and critical point, higher-order cumulants of conserved quantities are proposed as promising observables and have been studied extensively both experimentally and theoretically. For $4^{th}$-order cumulants it is predicted that there will be a non-monotonic energy dependence trend. For $5^{th}$- and $6^{th}$-order cumulants results from Lattice calculations suggest that they are connected to the smooth crossover transition at $\mu_{B}$ = 0. At high baryon density region, on the other hand, the higher-order cumulants are also sensitive to the first-order phase boundary.
In this talk, we will present net-proton cumulants up to $6^{th}$-order in Au+Au collisions at $\sqrt{s_{\rm{NN}}}$ = 7.7 - 200 from STAR Beam Energy Scan phase I and $\sqrt{s}$ = 200 GeV p+p collisions. Analysis update on STAR fixed target energy $\sqrt{s_{\rm{NN}}}$ = 3 GeV will also be shown. Physics implication as well as comparisons with various models will be discussed.
| Collaboration | STAR Collaboration |
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