May 13 – 19, 2018
Venice, Italy
Europe/Zurich timezone
The organisers warmly thank all participants for such a lively QM2018! See you in China in 2019!

Off-diagonal Cumulants of Net-charge, Net-proton, and Net-kaon Multiplicity Distributions in Au+Au collisions at STAR

May 15, 2018, 5:00 PM
2h 40m
First floor and third floor (Palazzo del Casinò)

First floor and third floor

Palazzo del Casinò

Poster Phase diagram and search for the critical point Poster Session


Mr Arghya Chatterjee (Variable Energy Cyclotron Centre)


Event-by-event fluctuations of conserved quantities have been extensively used to study the thermodynamic properties around phase transition region of QCD matter. According to lattice QCD calculation, the off-diagonal cumulants of net-charge ($Q$), net-baryon ($B$) and net-strangeness ($S$) and their ratios to diagonal cumulants are sensitive to the evolution of the system and to constrain the freeze-out parameters in the QCD phase diagram [1,2].

In this poster, we report a first measurement of $2^{nd}$-order off-diagonal cumulants of net-charge, net-proton and net-kaon multiplicity distributions at RHIC in Au+Au collisions at $\sqrt{s_{NN}} =$ 7.7, 11.5, 14.5, 19.6, 27, 39, 62.4 and 200 GeV. We study beam energy, centrality, and acceptance ($\eta$) window dependence of off-diagonal cumulants after implementing efficiency and other experimental corrections. The measured cumulants ratios are compared with the predictions from UrQMD and hadron resonance gas models. The results will be discussed in the context of understanding the correlated fluctuations of the conserved quantities.

[1] A. Majumder and B. Muller, Phys. Rev. C74, 054901 (2006).
[2] F. Karsch and K. Redlich, Phys. Lett. B695, 136 (2011).

Collaboration STAR
Content type Experiment
Centralised submission by Collaboration Presenter name already specified

Primary author

Zhenyu Ye (University of Illinois at Chicago)

Presentation materials