Compton Scattering by a Pion and off--Shell Effects

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dc.creatorScherer, S.
dc.creatorFearing, H. W.
dc.date1994-08-17
dc.date.accessioned2026-07-07T11:14:29Z
dc.date.available2026-07-07T11:14:29Z
dc.descriptionWe consider Compton scattering by a pion in the framework of chiral perturbation theory. We investigate off--shell effects in the s-- and u--channel pole diagrams. For that purpose we perform a field transformation which, in comparison with the standard Gasser and Leutwyler Lagrangian, generates additional terms at order $p^4$ proportional to the lowest--order equation of motion. As a result of the equivalence theorem the two Lagrangians predict the same Compton scattering S--matrix even though they generate different off--shell form factors. We conclude that off--shell effects are not only model--dependent but also representation--dependent.
dc.description13 pages in LaTeX, using RevTex macro, TRIUMF preprint TRI-PP-94-65
dc.identifierhttps://arxiv.org/abs/hep-ph/9408312
dc.identifierhttp://arxiv.org/abs/hep-ph/9408312
dc.identifierPhys.Rev.C51:359-363,1995
dc.identifierdoi:10.1103/PhysRevC.51.359
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/192087
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.titleCompton Scattering by a Pion and off--Shell Effects
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