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

Abstract

We present a lattice study of net-baryon number fluctuations in (2+1)-flavor QCD. The results are based on a Taylor expansion of the pressure with respect to the baryon chemical potential. We calculate higher moments of the net-baryon number fluctuations and compare with the corresponding resonance gas results. We find that for temperature below 0.9T_c the fluctuations seem to agree with the hadron resonance gas predictions. Close to T_c, higher moments are increasingly more sensitive to the critical behavior of the QCD phase transition. Furthermore, we estimate the radius of convergence of the Taylor series as well as the curvature of the transition line in the temperature chemical potential plane.

4 pages; invited talk presented at 'New Frontiers in QCD 2010' at the Yukawa Institute for Theoretical Physics, Kyoto, Japan, March 1-19

References in corpus (4)

• Signatures of the Tricritical Point in QCD
• Hadron production in central nucleus-nucleus collisions at chemical freeze-out
• QCD Equation of State and Hadron Resonance Gas
• O(N) universality and the chiral phase transition in QCD

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• Relation between baryon number fluctuations and experimentally observed proton number fluctuations in relativistic heavy ion collisions
• QCD critical region and higher moments for three flavor models
• Fluctuations of conserved charges in relativistic heavy ion collisions: An introduction
• Net-proton probability distribution in heavy ion collisions
• Mapping the phase diagram of strongly interacting matter
• Has Tc been measured by heavy ion experiments?
• Fluctuations, correlations and some other recent results from lattice QCD
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• Probing the QCD phase diagram with fluctuations
• Effects of finite volume and magnetic fields on thermodynamic properties of quark matter and fluctuations of conserved charges
• Moments of charge fluctuations, pseudo-critical temperatures and freeze-out in heavy ion collisions
• Net baryon number fluctuations across the chiral phase transition at finite density in the strong coupling lattice QCD
• Exact chiral invariance at finite density on the lattice
• Conserved Charge Fluctuations in a Chiral Hadronic Model including Hadrons and Quarks
• The sixth order cumulant of net-proton number in Binomial distribution at $\sqrt{s_{NN}}=$ 200 GeV
• Measurement of the ratio of the sixth order to the second order cumulant of net-proton multiplicity distributions in relativistic heavy-ion collisions
• Inflection point as a characteristic of the QCD critical point
• Exact Chiral Invariance at Finite Density on Lattice
• Strangeness at high temperatures