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 non-vanishing 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 freeze-out 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 $\sqrt{s_{NN}}$ dependence of skewness and kurtosis ratios of net proton-number fluctuations measured by the STAR Collaboration can be understood from QCD results for cumulants of conserved baryon-number 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.

8 pages, 11 figures, to be published in Nuclear Physics A, proceedings of the XXVI international conference on ultrarelativistic heavy-ion collisions, Quark Matter 2017, February 5-11, 2017

References in corpus (10)

• The equation of state in (2+1)-flavor QCD
• The QCD transition temperature: results with physical masses in the continuum limit
• Bulk Properties of the Medium Produced in Relativistic Heavy-Ion Collisions from the Beam Energy Scan Program
• The QCD Equation of State to $\mathcal{O}({\mu }_B^6)$ from Lattice QCD
• The phase boundary for the chiral transition in (2+1)-flavor QCD at small values of the chemical potential
• Additional Strange Hadrons from QCD Thermodynamics and Strangeness Freeze-out in Heavy Ion Collisions
• Hadron yields and the phase diagram of strongly interacting matter
• Constraining the hadronic spectrum through QCD thermodynamics on the lattice
• Quark number susceptibilities and equation of state at finite chemical potential in staggered QCD with Nt=8
• Net-baryon fluctuations measured with ALICE at the CERN LHC

Cited by in corpus (4)

• Global baryon number conservation encoded in net-proton fluctuations measured in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• The kurtosis of net baryon number fluctuations from a realistic Polyakov--Nambu--Jona-Lasinio model along the experimental freeze-out line
• Exploring the influence of bulk viscosity of QCD on dilepton tomography
• Recent results on net-baryon fluctuations in ALICE