CUMULANTS OF NET-PROTON NUMBER FLUCTUATIONS FROM ALICE AT THE LHC

초록

In the lattice QCD, the ratios of the various orders of quark number susceptibilities are used to determine freeze-out parameters and to locate the phase boundary. The cumulants of conserved charges fluctuations are directly related to the respective quark number susceptibilities. Therefore, the measurements of various order cumulants of conserved charges, such as the net-baryon number, can be used to determine the freeze-out parameters and to constrain the lattice QCD predictions. In this paper, we report on the first measurements of cumulants of net-proton number distributions up to the 4th order in Pb-Pb collisions with ALICE at the LHC. We also compare our results with RHIC measurements and hadron resonance gas model calculations.

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