Induced Gluon Radiation in a QCD Medium

Details Induced Gluon Radiation in a QCD Medium Induced Gluon Radiation in a QCD Medium

1994-11-28

arxiv.org/abs/hep-ph/9411409v2

Phys.Lett. B345 (1995) 277-286

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 3 included figures, latex file

Scientific paper

10.1016/0370-2693(94)01617-L

Soft gluon radiation induced by multiple scattering of a fast quark or gluon propagating through QCD matter is discussed. After revisiting the Landau-Pomeranchuk-Migdal effect in QED we show that large formation times of bremsstrahlung quanta determine the QCD radiation intensity (in analogy to QED) and derive the gluon energy spectrum. Coherent suppression takes place as compared to the Bethe-Heitler situation of independent emissions. As a result the energy loss of fast partons in a QCD medium depends on the incident energy $E$ similarly to QED, $-dE/dz \propto \sqrt{E}$.

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