Probing QCD chiral cross over transition in heavy ion collisions with fluctuations

Abstract

We argue that by measuring higher moments of the net proton number fluctuations in heavy ion collisions (HIC) one can probe the QCD chiral cross over transition experimentally. We discuss the properties of fluctuations of the net baryon number in the vicinity of the chiral crossover transition within the Polyakov loop extended quark-meson model at finite temperature and baryon density. The calculation includes non-perturbative dynamics implemented within the functional renormalization group approach. We find a clear signal for the chiral crossover transition in the fluctuations of the net baryon number. We address our theoretical findings to experimental data of STAR Collaboration on energy and centrality dependence of the net proton number fluctuations and their probability distributions in HIC.

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Cited by in corpus (8)

• Freeze-out conditions from net-proton and net-charge fluctuations at RHIC
• Lattice QCD and heavy ion collisions: a review of recent progress
• Global baryon number conservation encoded in net-proton fluctuations measured in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Distributions of the largest fragment size in multifragmentation: Traces of a phase transition
• Lattice QCD thermodynamics at finite chemical potential and its comparison with Experiments
• Conserved Charge Fluctuations in a Chiral Hadronic Model including Hadrons and Quarks
• Treating divergence in quark matter by using energy projectors
• Inflection point as a characteristic of the QCD critical point