Wave Function Renormalization at Finite Temperature

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dc.creatorEsposito, S.
dc.creatorMangano, G.
dc.creatorMiele, G.
dc.creatorPisanti, O.
dc.date1998-05-22
dc.date.accessioned2026-07-07T12:03:25Z
dc.date.available2026-07-07T12:03:25Z
dc.descriptionWe present a derivation of the medium dependent wave function renormalization for a spinor field in presence of a thermal bath. We show that, as already pointed out in literature, projector operators are not multiplicatively renormalized and the effect involves a non trivial spinor dependence, which disappears in the zero temperature covariant limit. The results, which differ from what already found in literature, are then applied to the decay of a massive scalar boson into two fermions and to the $β$--decay and crossed related processes relevant for primordial nucleosynthesis.
dc.description11 pages, RevTex
dc.identifierhttps://arxiv.org/abs/hep-ph/9805428
dc.identifierhttp://arxiv.org/abs/hep-ph/9805428
dc.identifierPhys.Rev.D58:105023,1998
dc.identifierdoi:10.1103/PhysRevD.58.105023
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/207776
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Theory
dc.titleWave Function Renormalization at Finite Temperature
dc.typetext

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