Pressure and nonlinear susceptibilities in QCD at finite chemical potentials

Gavai, Rajiv V.; Gupta, Sourendu

doi:10.1103/physrevd.68.034506

Cited by 264 publications

(340 citation statements)

References 15 publications

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“…The lattice QCD simulations turn out to be an accurate tool to study -among others -the thermodynamics of the hadronic and partonic matter up to temperatures of couple T c ; the critical temperature T c [26][27][28][29][30][31][32]. For two quark flavors (n f = 2) the phase transition is second-order or a rapid crossover .…”

Section: Deconfinement and Chiral Phase Transitions (Crossover ) Imentioning

confidence: 99%

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Quark-hadron phase transitions in the viscous early universe

Tawfik

Harkó

2012

Phys. Rev. D

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In the standard hot big bang theory, when the Universe was about 1 − 10 µs old, the cosmological matter is conjectured to undergo Quantum Chromodynamics (QCD) phase transition(s) from quark matter to hadrons. In the present work, we study the cosmological quark-hadron phase transition in two different physical scenarios. First, by assuming that the phase transition would be described by an effective nucleation theory (prompt first-order phase transition), we analyze the evolution of the relevant cosmological parameters of the early Universe (energy density ρ, temperature T , Hubble parameter H and the scale factor a) before, during and after the phase transition. To study the cosmological dynamics and the time evolution, we use both analytical and numerical methods. The case where the Universe evolved through a mixed phase with a small initial supercooling and monotonically growing hadronic bubbles is also considered in detail. The numerical estimation of the cosmological parameters, a and H for instance, shows that the time evolution of the Universe varies from phase to phase. As the QCD era turns to be fairly accessible in the high-energy experiments and the lattice QCD simulations, the QCD equation of state is very well defined. In light of these QCD results, we develop a systematic study of the crossover quark-hadron phase transition and an estimation for the time evolution of the Hubble parameter during the crossover .

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Section: Deconfinement and Chiral Phase Transitions (Crossover ) Imentioning

confidence: 99%

“…The critical temperature T c was a subject of different lattice QCD simulations [26][27][28][29][30][31][32]. We know so far that for two quark flavors (n f = 2) the transition is second-order or rapid crossover and T c ≃ 173 ± 8 MeV.…”

Section: Introductionmentioning

confidence: 99%

Quark-hadron phase transitions in the viscous early universe

Tawfik

Harkó

2012

Phys. Rev. D

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“…The importance of their evaluation in order to identify the relevant degrees of freedom in hot and dense QCD was first pointed out in [1,2,3], where the screening masses of mesons and nucleons were calculated on the lattice. More recent results can be found in [4,5,6,7,8,9].…”

Section: Introductionmentioning

confidence: 82%

Meson screening masses in the interacting QCD plasma

et al. 2007

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The meson screening mass in the pseudoscalar channel is calculated from the momentum dependent meson spectral function, using HTL fermionic propagators. A careful subtraction procedure is required to get an UV finite result. It is shown that in the whole range of temperatures explored here the HTL screening mass stays above the non-interacting result, slowly approaching the value m scr = 2 π 2 T 2 + m 2 ∞ , where m 2 ∞ is the HTL asymptotic thermal quark mass. Our analysis leads to a better understanding of the excitations of QGP at sufficiently large temperatures and may be of relevance for interpreting lattice results.

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“…In the last years small nonzero chemical potentials [ 8,9] have also been used to determine the EoS [ 10,11,12,13].…”

Section: Previous Resultsmentioning

confidence: 99%