Thermodynamics of Strong-Interaction Matter from Lattice QCD

Abstract

We review results from lattice QCD calculations on the thermodynamics of stronginteraction matter with emphasis on input these calculations can provide to the exploration of the phase diagram and properties of hot and dense matter created in heavy ion experiments. This review is organized as follows: arXiv:1504.05274v1 [hep-lat]

Reparametrizing the Polyakov–Nambu–Jona-Lasinio model

“…The µ B E values are quite large and differ within 30 MeV for both the interaction models. The estimates of the location of CEP obtained from the lattice QCD simulations with various limitations as summarized in [18], are still significantly different from our model estimates. [118] and [130], as well as the data from [134] denoted as LQCD.…”

“…Fluctuations of conserved charges are prominent quantities in this regard [15][16][17]. Lattice simulation results undoubtedly serve as a benchmark estimate over a large temperature window [18].…”

Neutron star structure from QCD

“…From fig. 7, one can in addition read that for 1.4M ⊙ neutron stars, our allowed radii range between 11 and 14.5 km, while for 2M ⊙ pulsars, R ∈ [10,15] km. It is also worth noting that within the bitrope approach, we find no configurations with masses above 2.5M ⊙ .…”

“…At vanishing baryon density, the efforts of several independent groups have indeed led to pinning down both the EoS, the (pseudo-)critical temperature of the deconfinement transition and various other quantities to a very good accuracy (see e.g. [10,11,12] for recent results), and by now there is impressive agreement on all relevant observables. Proceeding away from the µ B = 0 axis, the complex-valuedness of the lattice action, however, complicates things significantly, and it is only for rather small values of µ B /T that methods such as Taylor expanding physical observables around µ B = 0 [13] or statistical reweighting [14] allow one to accurately estimate their behavior.…”

Holographically emulating sequential versus instantaneous disappearance of vector mesons in a hot environment

“…The insight that, for 2+1 flavour QCD with physical quark masses, deconfinement happens within a cross over transition at temperatures of T QCD c = O(150 MeV) [1,2] (cf. [3,4] for recent reviews at zero net baryon density) makes such a picture more involved. Also the hints of bound states with charm above T QCD c [5] point to a complex behaviour of the strongly interacting matter and its constituents or degrees of freedom.…”