Lattice QCD results on soft and hard probes of strongly interacting matter
Abstract
We present recent results from lattice QCD relevant for the study of strongly interacting matter as it is produced in heavy ion collision experiments. The equation of state at nonvanishing density from a Taylor expansion up to 6^{th} order will be discussed for a strangeness neutral system and using the expansion coefficients of the series limits on the critical point are estimated. Chemical freezeout temperatures from the STAR and ALICE Collaborations will be compared to lines of constant physics calculated from the Taylor expansion of QCD bulk thermodynamic quantities. We show that qualitative features of the √{s_{NN}} dependence of skewness and kurtosis ratios of net protonnumber fluctuations measured by the STAR Collaboration can be understood from QCD results for cumulants of conserved baryonnumber fluctuations. As an example for recent progress towards the determination of spectral and transport properties of the QGP from lattice QCD, we will present constraints on the thermal photon rate determined from a spectral reconstruction of continuum extrapolated lattice correlation functions in combination with input from most recent perturbative calculations.
 Publication:

Nuclear Physics A
 Pub Date:
 November 2017
 DOI:
 10.1016/j.nuclphysa.2017.05.106
 arXiv:
 arXiv:1705.10682
 Bibcode:
 2017NuPhA.967..137K
 Keywords:

 Finite temperature and density QCD;
 Quark Gluon Plasma;
 fluctuations and correlations;
 critical point;
 High Energy Physics  Lattice;
 High Energy Physics  Phenomenology
 EPrint:
 8 pages, 11 figures, to be published in Nuclear Physics A, proceedings of the XXVI international conference on ultrarelativistic heavyion collisions, Quark Matter 2017, February 511, 2017