Probing the QCD phase diagram with fluctuations

Abstract

The relevance of higher order cumulants of conserved charges for the analysis of freeze-out and critical conditions in heavy ion collisions at LHC and RHIC is discussed. Using properties of $O(4)$ scaling functions, the generic structure of these higher cumulants at vanishing baryon chemical potential is discussed. Chiral model calculations are then used to study their properties at non-zero baryon chemical potential. It is argued that the rapid variation of sixth and higher order cumulants at the phase boundary may be used to explore the QCD phase diagram in experiment. Moreover, results for the Polyakov loop susceptibilities in SU(3) lattice gauge theory as well as in (2+1) flavor lattice QCD are discussed. An analysis of the ratios of susceptibilities indicates that the deconfinement transition is reflected in characteristic modifications of these ratios.

14 pages, 6 figures. To appear in the G.E. Brown memorial volume in NPA

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• Net-baryon number fluctuations in (2+1)-flavor QCD

Cited by in corpus (11)

• Search for the QCD Critical Point with Fluctuations of Conserved Quantities in Relativistic Heavy-Ion Collisions at RHIC : An Overview
• Collision Energy Dependence of Moments of Net-Kaon Multiplicity Distributions at RHIC
• Exploring the QCD Phase Structure with Beam Energy Scan in Heavy-ion Collisions
• Search for the QCD Critical Point in High Energy Nuclear Collisions
• Cumulants of Net-Proton, Net-Kaon and Net-Charge Multiplicity Distributions in Au+Au Collisions at RHIC BES Energies from UrQMD Model
• Effects of Nuclear Potential on the Cumulants of Net-Proton and Net-Baryon Multiplicity Distributions in Au+Au Collisions at $\sqrt{s_{\text{NN}}}=5\text{GeV}$
• Proton Cumulants and Correlation Functions in Au + Au Collisions at $\sqrt{s_{\mathrm{NN}}}$=7.7-200 GeV from UrQMD Model
• Net baryon number fluctuations across the chiral phase transition at finite density in the strong coupling lattice QCD
• Event-by-Event Efficiency Fluctuations and Efficiency Correction for Cumulants of Superposed Multiplicity Distributions in Relativistic Heavy-ion Collision Experiments
• Treating divergence in quark matter by using energy projectors
• Bubble nucleation in the two-flavor quark-meson model