Effects of magnetic fields on the quark–gluon plasma

2014 ◽  
Vol 931 ◽  
pp. 752-757 ◽  
Author(s):  
G.S. Bali ◽  
F. Bruckmann ◽  
G. Endrődi ◽  
Z. Fodor ◽  
S.D. Katz ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Quark Gluon Plasma ◽  
Gluon Plasma

scholarly journals Bulk viscosity of quark-gluon plasma in strong magnetic fields

2017 ◽  
Vol 96 (9) ◽  
Author(s):  
Koichi Hattori ◽  
Xu-Guang Huang ◽  
Dirk H. Rischke ◽  
Daisuke Satow
Keyword(s):  
Magnetic Fields ◽  
Bulk Viscosity ◽  
Quark Gluon Plasma ◽  
Gluon Plasma ◽  
Strong Magnetic Fields

QUASIPARTICLE MODEL OF THE QUARK/GLUON PLASMA IN A STRONG MAGNETIC FIELD

2001 ◽  
Vol 16 (14) ◽  
pp. 2473-2491
Author(s):  
MARINA GIBILISCO
Keyword(s):  
Magnetic Field ◽  
Equation Of State ◽  
Magnetic Fields ◽  
Neutron Stars ◽  
Strong Magnetic Field ◽  
Quark Gluon Plasma ◽  
Quark Matter ◽  
Gluon Plasma ◽  
Important Influence ◽  
Quasiparticle Model

In this paper, I study the effect of a strong magnetic field on the quark/gluon plasma, whose properties are investigated by using a quasiparticle model with effective thermal masses for both the quarks and the gluons. This analysis is performed looking at the perspectives opened by the study of the interior of neutron stars, where large magnetic fields, as high as 1018 G, might exist; the high densities present in their core might also favor the matter deconfinement. I show that the presence of a large magnetic field has an important influence on the equation of state of the deconfined plasma; the astrophysical relevance of this effect is also discussed, together with the present possibilities to detect a quark matter star.

scholarly journals SLAVNOV–TAYLOR IDENTITY FOR NONEQUILIBRIUM QUARK–GLUON PLASMA

2001 ◽  
Vol 16 (08) ◽  
pp. 531-540 ◽  
Author(s):  
K. OKANO
Keyword(s):  
Quark Gluon Plasma ◽  
Gluon Plasma ◽  
Polarization Tensor ◽  
Gluon Polarization ◽  
Time Path

Within the closed-time-path formalism of nonequilibrium QCD, we derive a Slavnov–Taylor (ST) identity for the gluon polarization tensor. The ST identity takes the same form in both Coulomb and covariant gauges. Application to quasi-uniform quark–gluon plasma (QGP) near equilibrium or nonequilibrium quasistationary QGP is made.

scholarly journals Quark Cluster Expansion Model for Interpreting Finite-T Lattice QCD Thermodynamics

Symmetry ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 514
Author(s):  
David Blaschke ◽  
Kirill A. Devyatyarov ◽  
Olaf Kaczmarek
Keyword(s):  
Lattice Qcd ◽  
Cluster Expansion ◽  
Quark Gluon Plasma ◽  
Degrees Of Freedom ◽  
Gluon Plasma ◽  
Polyakov Loop ◽  
Unified Approach ◽  
Narrow Temperature Interval ◽  
Levinson Theorem ◽  
Expansion Model

In this work, we present a unified approach to the thermodynamics of hadron–quark–gluon matter at finite temperatures on the basis of a quark cluster expansion in the form of a generalized Beth–Uhlenbeck approach with a generic ansatz for the hadronic phase shifts that fulfills the Levinson theorem. The change in the composition of the system from a hadron resonance gas to a quark–gluon plasma takes place in the narrow temperature interval of 150–190 MeV, where the Mott dissociation of hadrons is triggered by the dropping quark mass as a result of the restoration of chiral symmetry. The deconfinement of quark and gluon degrees of freedom is regulated by the Polyakov loop variable that signals the breaking of the Z(3) center symmetry of the color SU(3) group of QCD. We suggest a Polyakov-loop quark–gluon plasma model with O(αs) virial correction and solve the stationarity condition of the thermodynamic potential (gap equation) for the Polyakov loop. The resulting pressure is in excellent agreement with lattice QCD simulations up to high temperatures.

scholarly journals Medium induced QCD cascades: broadening and rescattering during branching

2021 ◽  
Vol 2021 (4) ◽  
Author(s):  
E. Blanco ◽  
K. Kutak ◽  
W. Płaczek ◽  
M. Rohrmoser ◽  
R. Straka
Keyword(s):  
Momentum Transfer ◽  
Quark Gluon Plasma ◽  
Evolution Equations ◽  
Gaussian Approximation ◽  
Gluon Plasma ◽  
Jet Quenching ◽  
Diffusive Approximation

Abstract We study evolution equations describing jet propagation through quark-gluon plasma (QGP). In particular we investigate the contribution of momentum transfer during branching and find that such a contribution is sizeable. Furthermore, we study various approximations, such as the Gaussian approximation and the diffusive approximation to the jet-broadening term. We notice that in order to reproduce the BDIM equation (without the momentum transfer in the branching) the diffusive approximation requires a very large value of the jet-quenching parameter $$ \hat{q} $$ q ̂ .

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