Is there still any Tc mystery in lattice QCD? Results with physical masses in the continuum limit III

By S. Borsányi, Zoltán Fodor, Christian Hoelbling, Sándor D. Katz, S. Krieg, C. Ratti, Kálmán K. Szabó. 2010

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The present paper concludes our investigations on the QCD cross-over transition temperatures with 2+1 staggered flavours and one-link stout improvement. We extend our previous two studies [Phys. Lett. B643 (2006) 46, JHEP 0906:088 (2009)] by choosing even finer lattices (Nt = 16) and we work again with physical quark masses. The new results on this broad cross-over are in complete agreement with our earlier ones. We compare our findings with the published results of the hotQCD collaboration. All these results are confronted with the predictions of the Hadron Resonance Gas model and Chiral Perturbation Theory for temperatures below the transition region. Our results can be reproduced by using the physical spectrum in these analytic calculations. The findings of the hotQCD collaboration can be recovered by using a distorted spectrum which takes into account lattice discretization artifacts and heavier than physical quark masses. This analysis provides a simple explanation for the observed discrepancy in the transition temperatures between our and the hotQCD collaborations.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/b285e3dc03021abd06dc5bf4eeb0d4cb467e0ce1

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Citations in the corpus

The phase diagram of dense QCD (2010, background): “(9) 147(2)(3) MeV and 165(5)(3) MeV for 2 + 1 flavours in the stout-link improved staggered action with Nt up to 16 determined by χm/T 4 and χs/T 2 (where χs is the strange-quark susceptibility) [107].”
Chiral crossover in QCD at zero and non-zero chemical potentials (2018, result): “ted in the 6 times more accurate determination of the continuum-extrapolated Tc(0). Our present value of Tc(0) also is compatible with the chiral pseudo-critical temperatures reported by other groups [35, 36]. It is pertinent to note that all our calculations were carried out within a nite-size box ”
Precision SU(3) lattice thermodynamics for a large temperature range (2012, background): “Later the same authors have extended their results to full QCD (with massless quarks) [7, 8], which was compared to results of the Wuppertal-Budapest collaboration [9].”
Gauge/String Duality, Hot QCD and Heavy Ion Collisions (2011, background): “However, the analysis performed in [202] indicates that the chiral susceptibility and the Polyakov loop susceptibility peak in the range of T = 150− 170 MeV.”
The QCD phase diagram from analytic continuation (2015, methodology): “ precision data set) is very close to the peak position of ˜ =m4ˇ. At nite I B the temperature dependence of h ir is shifted and very slightly stretched. We nd that the data at B = 0 (see Ref. [7]) can be very accurately described by simple t functions. The dependence in this case is well describ”