Feb 5 – 11, 2017
Hyatt Regency Chicago
America/Chicago timezone

Measurement of the cumulant of net-proton multiplicity distribution in Au+Au collisions at $\sqrt{s_{NN}}$ =7.7-200 GeV from the STAR experiment

Feb 8, 2017, 2:20 PM
Regency B

Regency B


Roli Esha (University of California - Los Angeles)


One of the main goals of the RHIC Beam Energy Scan program is to search for the QCD Critical Point (CP) and phase transition in heavy-ion collisions. Fluctuations of conserved quantities are highly sensitive to the correlation length, and are directly connected to the susceptibilities in the Lattice QCD. Therefore, they are ideal observables for finding the CP and phase transition signatures.
In this talk, we will present measurements of the cumulants of net-proton distributions from Au+Au collisions at $\sqrt{s_{NN}}$ = 7.7, 11.5, 14.5, 19.6, 27, 39, 62.4 (up to fourth order) and 200 GeV (up to sixth order) measured by the STAR experiment at RHIC. Multi-particle correlation functions are also extracted from the proton and anti-proton cumulants. It is observed that the four-particle correlations are positive. These provide additional insight into the non-monotonic energy dependence observed in fourth order proton fluctuations. Finally, we will discuss the corresponding physics implications.

Collaboration STAR
Preferred Track Correlations and Fluctuations

Primary author

Roli Esha (University of California - Los Angeles)

Presentation materials