Fermionic collective modes of an anisotropic quark-gluon plasma

Schenke, Bjoern; Strickland, Michael

doi:10.1103/physrevd.74.065004

Cited by 48 publications

(57 citation statements)

References 75 publications

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“…In recent years the study of anisotropic plasma has received much interest due to the fact that the QGP, which has a local momentum-space anisotropy, is subject to the chromo-Weibel instability [64,66,[68][69][70][71][72][73][74][75][76][77][78][79][80][81][82][83][84][85][86]. The effects of these instabilities are not very clear, but they are very important for the QGP evolution at the RHIC or LHC.…”

Section: Introductionmentioning

confidence: 99%

Shear viscosity η to electrical conductivity σel ratio for an anisotropic QGP

et al. 2017

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We study the transport properties of strongly interacting matter in the context of ultrarelativistic heavy ion collision experiments. We calculate the transport coefficients viz. shear viscosity (η) and electrical conductivity (σ el ) of the quark gluon plasma phase in the presence of momentum anisotropy arising from different expansion rates of the medium in longitudinal and transverse direction. We solve the relativistic Boltzmann kinetic equation in relaxation time approximation to calculate the shear viscosity and electrical conductivity. The calculation are performed within the quasiparticle model to estimate these transport coefficients and discuss the connection between them. We also compare the electrical conductivity results calculated from the quasiparticle model with the ideal case. We compare our results with the corresponding results obtained in different lattice as well as model calculations.

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Section: Introductionmentioning

confidence: 99%

Shear viscosity η to electrical conductivity σel ratio for an anisotropic QGP

et al. 2017

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“…For a medium described by anisotropic distribution functions of the type (2), the in-medium propagators continue to satisfy the KMS relation in the high temperature limit [27]. We can therefore simply follow [26,36] to calculate the retarded quark selfenergy with the modified distribution functions (2).…”

Section: Viscous Corrections To Thermal Photon Emission Ratesmentioning

confidence: 99%

“…In a plasma with locally anisotropic momentum distributions, these HTL self energies are anisotropic, too. In previous work [24][25][26], the HTL-resummed quark self-energy was evaluated for spheroidally deformed momentum distributions. In Ref.…”

Section: Viscous Corrections To Thermal Photon Emission Ratesmentioning

confidence: 99%

Anisotropic flow of thermal photons as a quark-gluon plasma viscometer

et al. 2015

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We present state-of-the-art calculations of viscous photon emission from nuclear collisions at RHIC and LHC. Fluctuating initial density profiles are evolved with event-by-event viscous hydrodynamics. Momentum spectra of thermal photons radiated by these explosively expanding fireballs and their pT -differential anisotropic flow coefficients vn(pT ) are computed, both with and without accounting for viscous corrections to the standard thermal emission rates. Viscous corrections to the rates are found to have a larger effect on the vn coefficients than the viscous suppression of hydrodynamic flow anisotropies. The benefits of taking the ratio of elliptic to triangular flow, v2/v3, are discussed, and the spacetime regions which contribute dominantly to the photon flow harmonics are identified. The directed flow v1 of thermal photons is predicted for RHIC and LHC energies.

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“…Any amount of momentum anisotropy in the distribution of the (high-momentum) plasma particles leads to chromomagnetic instabilities, which in the weakfield situation are straightforward generalizations of the Abelian Weibel instabilities [19] and whose dispersion laws have been worked out for specific cases of a stationary anisotropic plasma in Ref. [20,21,22,23]. In an Abelian plasma, the Weibel instabilities grow exponentially until they are large enough to modify the distribution of the hard particles and give rise to their fast isotropization.…”

Section: Introductionmentioning

confidence: 99%

Instabilities of an anisotropically expanding non-Abelian plasma:1D+3Vdiscretized hard-loop simulations

2008

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Non-Abelian plasma instabilities play a crucial role in the nonequilibrium dynamics of a weakly coupled quark-gluon plasma and they importantly modify the standard perturbative bottom-up thermalization scenario in heavy-ion collisions. Using the auxiliary-field formulation of the hard-loop effective theory, we study numerically the real time evolution of instabilities in an anisotropic collisionless Yang-Mills plasma expanding longitudinally in free streaming. In this first real-time lattice simulation we consider the most unstable modes, long-wavelength coherent color fields that are constant in transverse directions and which therefore are effectively 1+1-dimensional in spacetime, except for the auxiliary fields which also depend on discretized momentum rapidity and transverse velocity components. We reproduce the semi-analytical results obtained previously for the Abelian regime and we determine the nonlinear effects which occur when the instabilities have grown such that non-Abelian interactions become important.

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Fermionic collective modes of an anisotropic quark-gluon plasma

Cited by 48 publications

References 75 publications

Shear viscosity η to electrical conductivity σel ratio for an anisotropic QGP

Shear viscosity η to electrical conductivity σel ratio for an anisotropic QGP

Anisotropic flow of thermal photons as a quark-gluon plasma viscometer

Instabilities of an anisotropically expanding non-Abelian plasma:1D+3Vdiscretized hard-loop simulations

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