Landau-Pomeranchuk-Migdal resummation for dilepton production

Aurenche, P.; Gelis, François; Moore, Guy D.; Zaraket, H.

doi:10.1088/1126-6708/2002/12/006

Cited by 109 publications

(188 citation statements)

References 37 publications

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“…bremsstrahlung [15]. Around the lightcone the loop expansion breaks down due to the Landau-Pomeranchuk-Migdal effect and an infinite series of ladder diagrams contribute at leading order in the strong coupling constant [16,17]. Finally for very soft momenta and energies, the structure of currentcurrent spectral functions is determined by general hydrodynamical considerations [18].…”

Section: Continuummentioning

confidence: 99%

Continuum and lattice meson spectral functions at nonzero momentum and high temperature

2005

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We analyse discretization effects in the calculation of high-temperature meson spectral functions at nonzero momentum and fermion mass on the lattice. We do so by comparing continuum and lattice spectral functions in the infinite temperature limit. Complete analytical results for the spectral densities in the continuum are presented, along with simple expressions for spectral functions obtained with Wilson and staggered fermions on anisotropic lattices. We comment on the use of local and point split currents. ‡

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Section: Continuummentioning

confidence: 99%

Continuum and lattice meson spectral functions at nonzero momentum and high temperature

2005

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“…This finds its manifestation in a too rapid rise of the spectral density which, in turn, leads to an infrared divergent Euclidean correlator of the vector current [13]. This low invariant mass regime has been examined in much detail [14,15] and it has been demonstrated that the spectral function at low energies will increase linearly with energy giving rise to a finite, non vanishing electrical conductivity of the quark gluon plasma. Lattice calculations of Euclidean time correlation functions can give access to spectral functions [16].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2011

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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 ≃ 1.45T c for four values of the lattice cut-off on lattices up to size 128 3 × 48. This allows to perform a continuum extrapolation of the correlation function in the Euclidean time interval 0.2 ≤ τ T ≤ 0.5, which extends to the largest temporal separations possible at finite temperature, to better than 1% accuracy. In this interval, at the value of the temperature investigated, we find that the vector correlation function never deviates from the free correlator for massless quarks by more than 9%. We also determine the first two non-vanishing thermal moments of the vector meson spectral function. The second thermal moment deviates by less than 7% from the free value. With these constraints, we then proceed to extract information on the spectral representation of the vector correlator and discuss resulting consequences for the electrical conductivity and the thermal dilepton rate in the plasma phase.

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“…Its treatment require the resummation of an infinite number of ladder exchanges of spacelike HTL gluons. This has been done for photons first [12] and later extended to small-M dileptons [13]. In the latter case it is important to note that the Born term in Fig.…”

Section: Nlo At Small Mmentioning

confidence: 99%

The thermal dilepton rate at NLO at small and large invariant mass

Ghiglieri

2016

Nuclear and Particle Physics Proceedings

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We report on a recent next-to-leading order perturbative determination of the dilepton rate from a hot QCD plasma for frequency and momentum of the order of the temperature and for much smaller invariant mass M ∼ gT . We briefly review the calculation, which generalizes the previous one for the photon case (M = 0). We then analyze the consequences of the new calculation for the extraction of the photon rate from the small mass dilepton measurements. We then review a recent NLO determination at large M and we show how to match and merge its results with the low-mass ones, resulting in a single rate which is NLO-accurate over the phenomenologically relevant region.

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Landau-Pomeranchuk-Migdal resummation for dilepton production

Cited by 109 publications

References 37 publications

Continuum and lattice meson spectral functions at nonzero momentum and high temperature

Continuum and lattice meson spectral functions at nonzero momentum and high temperature

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

The thermal dilepton rate at NLO at small and large invariant mass

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