Conveners
QCD Phase diagram
- Joachim Stroth (Goethe-Universität)
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Frithjof Karsch (Brookhaven National Laboratory)24/05/2011, 15:00Correlations and fluctuationsParallelIn the chiral limit and at temperatures close to the QCD phase transition temperature physical observables are expected to show universal properties that are controlled by the symmetry class of a 3-dimensional O(4) spin model [1]. Higher moments of net baryon number as well as electric charge fluctuations are sensitive to these universal features of the chiral phase transition [2]. The...Go to contribution page
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Dr Peter Petreczky (BNL)24/05/2011, 15:20QCD phase diagramParallelI will discuss new lattice results on the deconfinement and chiral aspects of the transition in QCD at nonzero temperature. I will report on calculations performed using the Highly Improved Staggered Quark (HISQ) action on Nt=6, 8 and 12 lattices. I will show the continuum extrapolation for several quantities that are discussed in connection with the transition at nonzero temperature as...Go to contribution page
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Zoltan Fodor (BUW)24/05/2011, 15:40QCD phase diagramParallelThe QCD transition is studied on lattices up to Nt=16. The strange susceptibility the chiral condensate and the renormalized Polyakov loops are presented. The equation of state is determined on lattice with Nt-6,8,10 and at some temperature values with Nt=12. The pressure, the trace anomaly, the energy and entropy density and the speed of sound are presented as functions of the temperature in...Go to contribution page
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Dr Vladimir Skokov (GSI, Darmstadt, Germany)24/05/2011, 16:00QCD phase diagramParallelFluctuations of conserved charges are key probes of the chiral phase transition in a QCD medium. Of particular phenomenological importance are studies of such fluctuations at finite baryon density. A valuable tool for assessing critical fluctuations and the thermodynamics at non-vanishing baryon density is provided by effective chiral models. We consider the Polyakov loop-extended two...Go to contribution page
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Dr Pasi Huovinen (Johann Wolfgang Goethe-Universität)24/05/2011, 16:20QCD phase diagramParallelThe effects of non-zero baryon density are expected to become important in hydrodynamic modeling of heavy collisions below the highest energy at RHIC. Recent calculations in effective models and in QCD using Dyson Schwinger equation suggest that the transition in QCD remains a crossover up to baryon chemical potentials of about 800MeV [1]. If so, the equation of state relevant for...Go to contribution page
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Prof. Sourendu Gupta (TIFR, Mumbai)24/05/2011, 16:40QCD at high temperature and densityParallelWe present a test of QCD in the non-perturbative domain through a comparison of thermodynamic fluctuations predicted in lattice computations with the experimental data of baryon distributions in high-energy heavy-ion collisions. This study provides evidence for thermalization in these collisions, and allow us to set a scale for the QCD phase diagram. The scale is the temperature for the cross...Go to contribution page
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Dr Nan Su (Bielefeld University)24/05/2011, 17:00QCD at high temperature and densityParallelThe weak-coupling expansion of the QCD free energy is known to order g^6*log[g], however, the resulting series is poorly convergent at phenomenologically relevant temperatures. I will discuss how the gauge invariant hard-thermal-loop perturbation theory (HTLpt) reorganization of the calculation improves the convergence of the successive approximations to the QCD free energy. I will present new...Go to contribution page