Higher moment fluctuations of identified particle distributions from ALICE


Behera N. K., Acharya S., Acosta F. T., Adamova D., Adolfsson J., Aggarwal M. M., ...More

NUCLEAR PHYSICS A, vol.982, pp.851-854, 2019 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 982
  • Publication Date: 2019
  • Doi Number: 10.1016/j.nuclphysa.2018.11.030
  • Journal Name: NUCLEAR PHYSICS A
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.851-854
  • Keywords: Fluctuations, conserved quantum number, freeze-out parameters, lattice QCD, ALICE, LHC, MODEL
  • Bursa Uludag University Affiliated: No

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.