# Online Strangeness in Quark Matter Conference 2021

May 17 – 22, 2021
US/Eastern timezone

## Higher-Order Cumulants of Net-Proton Multiplicity Distributions from RHIC-STAR

May 18, 2021, 11:30 AM
20m
Room A (Zoom)

### Room A

#### Zoom

zoom co-host: Niveditha Ramasubramanian https://stonybrook.zoom.us/j/99346269726
Experimental talk

### Speaker

Mr Yu Zhang (Central China Normal University)

### 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