QCD at non-zero temperature: Status and prospects

Petreczky, Péter

doi:10.1063/1.4795947

Cited by 11 publications

(7 citation statements)

References 177 publications

(361 reference statements)

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“…These terms are negligible at low temperatures if the mass of the particle is quite heavy compared to the temperature. For the case of baryon, χ 4 B and χ 2 B have almost same values as the baryon charge is dominantly carried by protons which has a mass much higher than the temperature. On the other hand, for electric charge, the leading order contribution comes from pion, the mass of which is comparable to the temperature.…”

Section: Resultsmentioning

confidence: 87%

“…At low temperature (T) and low baryon chemical potential (μ B ) strongly interacting matter consists of colorless hadrons, while at high temperature and/or high baryon density the fundamental degrees of freedom are colored quarks and gluons. At low baryon density and high temperature transition from hadronic phase to quark gluon plasma phase (QGP), as suggested by lattice QCD (LQCD) simulation, is actually an analytic cross over [1][2][3][4][5][6]. At low temperature and high baryon density, hadron-QGP phase transition is of first order as shown in many QCD effective model calculations [7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 94%

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Interacting hadron resonance gas model in magnetic field and the fluctuations of conserved charges

Kadam

Pal

Bhattacharyya

2020

J. Phys. G: Nucl. Part. Phys.

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In this paper we discuss the interacting hadron resonance gas (HRG) model in presence of a constant external magnetic field. The short range repulsive interaction between hadrons are accounted through Van der Waals excluded volume correction to the ideal gas pressure. Here we take the sizes of hadrons as r π (pion radius) = 0 fm, r K (kaon radius) = 0.35 fm, r m (all other meson radii) = 0.3 fm and r b (baryon radii) = 0.5 fm. We analyse the effect of uniform background magnetic field on the thermodynamic properties of interacting hadron gas. We especially discuss the effect of interactions on the behaviour of magnetization of low temperature hadronic matter. The vacuum terms have been regularized using magnetic field independent regularization scheme. We find that the magnetization of hadronic matter is positive which implies that the low temperature hadronic matter is paramagnetic. We further find that the repulsive interactions have very negligible effect on the overall magnetization of the hadronic matter and the paramagnetic property of the hadronic phase remains unchanged. We have also investigated the effects of short range repulsive interactions as well as the magnetic field on the baryon and electric charge number susceptibilities of hadronic matter within the ambit of excluded volume HRG model.

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Section: Resultsmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 94%

Interacting hadron resonance gas model in magnetic field and the fluctuations of conserved charges

Kadam

Pal

Bhattacharyya

2020

J. Phys. G: Nucl. Part. Phys.

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“…In the actual calculations, the δ-distribution term on the light cone will be subtracted, and we will address the regular part [Eq. (13)] including the overall exponential decay in time, i.e.,…”

Section: A Analytical Resultsmentioning

confidence: 99%

“…In fact, the knowledge about the phase diagram of strongly interacting hadronic/partonic matter has been increased substantially in the last decades. At vanishing (or low) chemical potentials, lattice QCD (lQCD) calculations have provided reliable results on the equation of state [12,13] and given a glance at the transport properties (or correlators [14][15][16][17][18][19][20][21][22][23][24][25]) in particular in the partonic phase.…”

Section: Introductionmentioning

confidence: 99%

Microcausality in strongly interacting fields

Rauber

Cassing

2014

Phys. Rev. D

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We study the properties of strongly interacting massive quantum fields in space-time as resulting from a parametric decay of the fields with a large decay width $\gamma$. The resulting imaginary part of the retarded and advanced propagators in this case is of Lorentzian form and the theory conserves microcausality, i.e. the commutator between the fields vanishes for space-like distances in space-time. However, when considering separately space-like and time-like components of the spectral function in momentum space we find microcausality to be violated for each component separately. This implies that the modeling of effective field theories for strongly interacting systems has to be considered with great care and restrictions to time-like four momenta in case of broad spectral functions have to be ruled out. Furthermore, when employing effective propagators with a width $\gamma({\bf p}^2)$ depending explicitly on three-momentum ${\bf p}$ the commutator of the fields no longer vanishes for $r>t$ since the related field theory becomes nonlocal and violates microcausality.Comment: 7 pages, 5 figures, submitted to Phys. Rev.

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“…At low temperature (T ) and low baryon chemical potential (µ) the fundamental degrees of freedom of QCD are colorless hadrons while at high temperature and high baryon density the fundamental degrees of freedom are colored quarks and gluons. Lattice quantum chromodynamics (LQCD) simulations at zero chemical potential and finite temperature suggest a crossover transition for the QCD matter from hadronic phase to a quark-gluon-plasma (QGP) phase [1][2][3][4][5][6]. At zero chemical potential, the chiral crossover temperature is estimated to be T c ∼ 156 MeV [7].…”

Section: Introductionmentioning

confidence: 99%

Hadron resonance gas with repulsive mean field interaction: Thermodynamics and transport properties

Kadam

Mishra

2019

Phys. Rev. D

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We discuss the interacting hadron resonance gas model to describe the thermodynamics of hadronic matter. While the attractive interaction between hadrons is taken care of by including all the resonances with zero width, the repulsive interactions are included by considering density-dependent mean field potentials. The bulk thermodynamic quantities are confronted with the lattice quantum chromodynamics simulation results at zero as well as at finite baryon chemical potential. We further estimate the shear and bulk viscosity coefficients of hot and dense hadronic matter within ambit of this interacting hadron resonance gas model.

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QCD at non-zero temperature: Status and prospects

Abstract: I will discuss recent progress in lattice QCD calculations related to the QCD phase diagram, equation of state and meson spectral functions.

Cited by 11 publications

References 177 publications

Interacting hadron resonance gas model in magnetic field and the fluctuations of conserved charges

Interacting hadron resonance gas model in magnetic field and the fluctuations of conserved charges

Microcausality in strongly interacting fields

Hadron resonance gas with repulsive mean field interaction: Thermodynamics and transport properties

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