Parton–Hadron-String Dynamics at relativistic collider energies

Bratkovskaya, Elena; Cassing, W.; Konchakovski, V. P.; Linnyk, O.

doi:10.1016/j.nuclphysa.2011.03.003

Cited by 208 publications

(277 citation statements)

References 111 publications

(176 reference statements)

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“…In our calculations we solve Eq. (1) by mapping the phase space of the fluid by means of test particles; the collision integral is computed using Monte Carlo methods based on the stochastic interpretation of transition amplitude [4][5][6][7][8][9][10][11][12].…”

Section: Relativistic Transport Theorymentioning

confidence: 99%

Modelling early stages of relativistic heavy-ion collisions

Ruggieri

Puglisi

Oliva

et al. 2016

EPJ Web of Conferences

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In this study we model early time dynamics of relativistic heavy ion collisions by an initial color-electric field which then decays to a plasma by the Schwinger mechanism. The dynamics of the many particles system produced by the decay is described by relativistic kinetic theory, taking into account the backreaction on the color field by solving self-consistently the kinetic and the field equations. Our main results concern isotropization and thermalization for a 1 + 1D expanding geometry. In case of small η/s (η/s 0.3) we find τ isotropization ≈ 0.8 fm/c and τ thermalization ≈ 1 fm/c in agreement with the common lore of hydrodynamics.

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Section: Relativistic Transport Theorymentioning

confidence: 99%

Modelling early stages of relativistic heavy-ion collisions

Ruggieri

Puglisi

Oliva

et al. 2016

EPJ Web of Conferences

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“…[68,71]). Furthermore, the spectral distribution for the mass of the quasiparticle has a finite pole mass M q (T, µ q ) that is also fixed in the DQPM, as well as the density of (u,ū, d,d, s,s) quarks/antiquarks as a function of temperature and chemical potential (cf.…”

Section: A Constant Electric Fieldsmentioning

confidence: 99%

“…For further details on the PHSD off-shell transport approach and hadronization we refer the reader to Refs. [17,60,71,72].…”

Section: Introductionmentioning

confidence: 99%

Electric and magnetic response of hot QCD matter

Steinert

Cassing

2014

Phys. Rev. C

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We study the electric conductivity as well as the magnetic response of hot QCD matter at various temperatures T and chemical potentials µq within the off-shell Parton-Hadron-String Dynamics (PHSD) transport approach for interacting partonic systems in a finite box with periodic boundary conditions. The response of the strongly-interacting system in equilibrium to an external electric field defines the electric conductivity σ0 whereas the response to a moderate external magnetic field defines the induced diamagnetic moment µL (T, µq) as well as the spin susceptibility χS(T, µq). We find a sizeable temperature dependence of the dimensionless ratio σ0/T well in line with calculations in a relaxation time approach for Tc < T < 2.5Tc as well as an increase of σ0 with µ 2 q /T 2 . Furthermore, the frequency dependence of the electric conductivity σ(Ω) shows a simple functional form well in line with results from the Dynamical QuasiParticle Model (DQPM). The spin susceptibility χS(T, µq) is found to increase with temperature T and to rise ∼ µ 2 q /T 2 , too. The actual values for the magnetic response of the QGP in the temperature range below 250 MeV show that the QGP should respond diamagnetically in actual ultra-relativistic heavy-ion collisions since the maximal magnetic fields created in these collisions are smaller than Bc(T ) which defines a boundary between diamagnetism and paramagnetism.

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“…There are various models which can be used to study the region near T c , which we call the "semi" Quark-Gluon Plasma. This includes Parton Hadron String Dynamics [50][51][52][53][54][55], Polyakov loop models [56][57][58], the functional renormalization group [59][60][61][62][63][64][65][66][67][68][69][70], background field methods [71][72][73], and lastly, matrix models [74][75][76][77][78][79][80][81][82][83][84][85].…”

Section: Jhep10(2015)005mentioning

confidence: 99%

Dilepton and photon production in the presence of a nontrivial Polyakov loop

Hidaka¹,

Lin²,

Pisarski³

et al. 2015

J. High Energ. Phys.

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Abstract:We calculate the production of dileptons and photons in the presence of a nontrivial Polyakov loop in QCD. This is applicable to the semi-Quark Gluon Plasma (QGP), at temperatures above but near the critical temperature for deconfinement. The Polyakov loop is small in the semi-QGP, and near unity in the perturbative QGP. Working to leading order in the coupling constant of QCD, we find that there is a mild enhancement, ∼ 20%, for dilepton production in the semi-QGP over that in the perturbative QGP. In contrast, we find that photon production is strongly suppressed in the semi-QGP, by about an order of magnitude, relative to the perturbative QGP. In the perturbative QGP photon production contains contributions from 2 → 2 scattering and collinear emission with the Landau-Pomeranchuk-Migdal (LPM) effect. In the semi-QGP we show that the two contributions are modified differently. The rate for 2 → 2 scattering is suppressed by a factor which depends upon the Polyakov loop. In contrast, in an SU(N ) gauge theory the collinear rate is suppressed by 1/N , so that the LPM effect vanishes at N = ∞. To leading order in the semi-QGP at large N , we compute the rate from 2 → 2 scattering to the leading logarithmic order and the collinear rate to leading order.

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Parton–Hadron-String Dynamics at relativistic collider energies

Cited by 208 publications

References 111 publications

Modelling early stages of relativistic heavy-ion collisions

Modelling early stages of relativistic heavy-ion collisions

Electric and magnetic response of hot QCD matter

Dilepton and photon production in the presence of a nontrivial Polyakov loop

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