Lattice constraints on the thermal photon rate

  title={Lattice constraints on the thermal photon rate},
  author={Jacopo Ghiglieri and O. Kaczmarek and Mikko Laine and Florian Meyer},
  journal={Physical Review D},
We estimate the photon production rate from an SU(3) plasma at temperatures of about 1.1Tc and 1.3Tc. Lattice results for the vector current correlator at spatial momenta k∼(2−6)T are extrapolated to the continuum limit and analyzed with the help of a polynomial interpolation for the corresponding spectral function, which vanishes at zero frequency and matches to high-precision perturbative results at large invariant masses. For small invariant masses the interpolation is compared with the next… 

Figures and Tables from this paper

Testing thermal photon and dilepton rates

Abstract We confront the thermal NLO vector spectral function (both the transverse and longitudinal channel with respect to spatial momentum, both above and below the light cone) with

Lattice QCD estimate of the quark-gluon plasma photon emission rate

We present a computation of the photon emission rate of the quark-gluon plasma from two-flavor lattice QCD at a temperature of 254 MeV, which follows up on the work presented in [1]. We perform a

Hadronic correlators at high temperature: Spectral and transport properties

In the present thesis we approach the questions of deconfinement properties as well as transport properties of mesons in the Quark Gluon Plasma close to the transition tem- perature in the framework

Photon production and elliptic flow from a momentum-anisotropic quark-gluon plasma

The emission of real photons from a momentum-anisotropic quark-gluon plasma (QGP) is affected by both the collective flow of the radiating medium and the modification of local rest frame emission

Direct-Photon Spectra and Anisotropic Flow in Heavy Ion Collisions from Holography

The thermal-photon emission from strongly coupled gauge theories at finite temperature is calculated by using holographic models for QCD in the Veneziano limit (V-QCD). These emission rates are then

Dilepton production spectrum above Tc with a lattice quark propagator

The photon production rate from the deconfined medium is analyzed with the photon self-energy constructed from the quark propagator obtained by the numerical simulation on the quenched lattice for

Electrical conductivity of the quark-gluon plasma from the low energy limit of photon and dilepton spectra

Fluid dynamic considerations are used to determine the electric current spectral density in the regime of small energies and momenta. The spectral density in this regime is parameterized by the

Open and Hidden CharmMesons at Finite Temperaturefrom Anisotropic Lattice QCD

The quark-gluon plasma (QGP) is conjectured to have existed in the early stages of the Big Bang and it has been discovered in heavy ion collisions. The internal properties of the medium are not

Impact of the pre-equilibrium stage of ultra-relativistic heavy ion collisions: isotropization and photon production

  • L. Oliva
  • Physics
    The European Physical Journal Plus
  • 2019
Abstract.We present a model in which gluon and quark pairs are produced by means of the Schwinger mechanism from the decay of color-electric flux tubes, which are expected to be produced in the early



Thermal dilepton rate and electrical conductivity: An analysis of vector current correlation functions in quenched lattice QCD

We calculate the vector current correlation function for light valence quarks in the deconfined phase of QCD. The calculations have been performed in quenched lattice QCD at T ≃ 1.45Tc for four

A relation between screening masses and real-time rates

A bstractThermal screening masses related to the conserved vector current are determined for the case that the current carries a non-zero Matsubara frequency, both in a weak-coupling approach and

Nonperturbative estimate of the heavy quark momentum diffusion coefficient

We estimate the momentum diffusion coefficient of a heavy quark within a pure SU(3) plasma at a temperature of about 1.5Tc. Large-scale Monte Carlo simulations on a series of lattices extending up to

Low mass thermal dilepton production at NLO in a weakly coupled quark-gluon plasma

A bstractWe present a computation, within weakly-coupled thermal QCD, of the production rate of low invariant mass (M2 ~ g2T2) dileptons, at next-to-leading order (NLO) in the coupling (which is

NLO thermal dilepton rate at non-zero momentum

A bstractThe vector channel spectral function and the dilepton production rate from a QCD plasma at a temperature above a few hundred MeV are evaluated up to next-to-leading order (NLO) including

Thermal 2-loop master spectral function at finite momentum

A bstractWhen considering NLO corrections to thermal particle production in the “relativistic” regime, in which the invariant mass squared of the produced particle is $ {{\mathcal{K}}^2} $ ~ (πT)2,

Photon and dilepton emission from the quark-gluon plasma: Some general considerations.

It is argued that if there is a first order phase transition, as beam energy or nuclear baryon number is raised through the threshold for production of a plasma, the rate for photon or di-lepton emission might dramatically increase.

Charge transport and vector meson dissociation across the thermal phase transition in lattice QCD with two light quark flavors

We compute and analyze correlation functions in the isovector vector channel at vanishing spatial momentum across the deconfinement phase transition in lattice QCD. The simulations are carried out at

Thermal dilepton rates and electrical conductivity of the QGP from the lattice

We investigate the temperature dependence of the thermal dilepton rate and the electrical conductivity of the gluon plasma at temperatures of $1.1T_c$, $1.3T_c$ and $1.5T_c$ in quenched QCD. Making

O(g) plasma effects in jet quenching

We consider the bremsstrahlung energy loss of high-energy partons moving in the quark-gluon plasma, at weak coupling. We show that the rates for these processes receive large $O(g)$ corrections from