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 $4^{th}$ order in Pb--Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 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.

4 pages, 3 figures, Proceedings of XXVIIth International Conference on Ultrarelativistic Nucleus-Nucleus Collisions (Quark Matter 2018)

References in corpus (3)

• The order of the quantum chromodynamics transition predicted by the standard model of particle physics
• Probing freeze-out conditions in heavy ion collisions with moments of charge fluctuations
• More efficient formulas for efficiency correction of cumulants and effect of using averaged efficiency

Cited by in corpus (10)

• Mapping the Phases of Quantum Chromodynamics with Beam Energy Scan
• Dynamics of critical fluctuations: Theory -- phenomenology -- heavy-ion collisions
• Factorial cumulants from global baryon number conservation
• Factorial cumulants from short-range correlations and global baryon number conservation
• Investigating correlated fluctuations of conserved charges with net-$\Lambda$ fluctuations in Pb-Pb collisions at ALICE
• Generalized nonlinear Langevin equation from quantum nonlinear projection operator
• Cumulants from short-range correlations and baryon number conservation - next-to-leading order
• Cumulants from fluctuating width of rapidity distribution
• Baseline study for net-proton number fluctuations at top energies available at the BNL Relativistic Heavy Ion Collider and at the CERN Large Hadron Collider with the Angantyr model
• The Equation of State and Multiparticle Production