Bloch-Nordsieck Estimates of High-Temperature QED

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dc.creatorFried, H. M.
dc.creatorGrandou, T.
dc.creatorSheu, Y. -M.
dc.date2008-04-10
dc.date.accessioned2026-07-07T11:33:34Z
dc.date.available2026-07-07T11:33:34Z
dc.descriptionIn anticipation of a subsequent application to QCD, we consider the case of QED at high temperature. We introduce a Fradkin representation into the exact, Schwingerian, functional expression of a fermion propagator, as well as a new and relevant version of the Bloch-Nordsieck (BN) model, which extracts the soft contributions of every perturbative graph, in contradistinction to the assumed separation of energy scales of previous semi-perturbative treatments. Our results are applicable to the absorption of a fast particle which enters a heat bath, as well as to the propagation of a symmetric pulse within the thermal medium due to the appearance of an instantaneous, shock-wave-like source acting in the medium. An exponentially-decreasing time dependence of the incident particle's initial momentum combines with a stronger decrease in the particle's energy, estimated by a sum over all Matsubara frequencies, to model an initial "fireball", which subsequently decays in a Gaussian fashion. When extended to QCD, qualitative applications could be made to RHIC scattering, in which a fireball appears, expands and is damped away.
dc.description22 pages, RevTeX with BibTeX
dc.identifierhttps://arxiv.org/abs/0804.1591
dc.identifierhttp://arxiv.org/abs/0804.1591
dc.identifierPhys.Rev.D77:105027,2008
dc.identifierdoi:10.1103/PhysRevD.77.105027
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/197938
dc.subjectHigh Energy Physics - Theory
dc.titleBloch-Nordsieck Estimates of High-Temperature QED
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