Higher moment fluctuations of identified particle distributions from ALICE
Abstract
Cumulants of conserved charges fluctuations are regarded as a potential
tool to study the criticality in the QCD phase diagram and to determine
the freeze-out parameters in a model-independent way. At LHC energies,
the measurements of the ratio of the net-baryon (net-proton) cumulants
can be used to test the lattice QCD predictions. In this work, we
present the first measurements of cumulants of the net-proton number
distributions up to 4th order in Pb-Pb collisions at root s(NN) = 2.76
and 5.02 TeV as a function of collision centrality. We compare our
cumulant ratios results with the STAR experiment net-proton results
measured in the first phase of the Beam Energy Scan program at RHIC. The
results can be used to obtain the chemical freeze-out parameters at LHC.
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