Publication: Higher moment fluctuations of identified particle distributions from ALICE
Дата
2019
Авторы
Behera, N. K.
Acharya, S.
Acosta, F. T.
Adamova, D.
Belyaev, V.
Bogdanov, A.
Grigoriev, V.
Kaplin, V.
Kondratyeva, N.
Loginov, V.
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Аннотация
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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Higher moment fluctuations of identified particle distributions from ALICE / Behera, NK [et al.] // NUCLEAR PHYSICS A. - 2019. - 982. - P. 851-854. - 10.1016/j.nuclphysa.2018.11.030