The polarizability of the pion: no conflict between dispersion theory and chiral perturbation theory

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dc.creatorPasquini, B.
dc.creatorDrechsel, D.
dc.creatorScherer, S.
dc.date2008-05-02
dc.date.accessioned2026-07-07T11:33:44Z
dc.date.available2026-07-07T11:33:44Z
dc.descriptionRecent attempts to determine the pion polarizability by dispersion relations yield values that disagree with the predictions of chiral perturbation theory. These dispersion relations are based on specific forms for the absorptive part of the Compton amplitudes. The analytic properties of these forms are examined, and the strong enhancement of intermediate-meson contributions is shown to be connected with spurious singularities. If the basic requirements of dispersion relations are taken into account, the results of dispersion theory and effective field theory are not inconsistent.
dc.description30 pages, 8 figures, 6 tables
dc.identifierhttps://arxiv.org/abs/0805.0213
dc.identifierhttp://arxiv.org/abs/0805.0213
dc.identifierPhys.Rev.C77:065211,2008
dc.identifierdoi:10.1103/PhysRevC.77.065211
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/198000
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Experiment
dc.subjectNuclear Theory
dc.titleThe polarizability of the pion: no conflict between dispersion theory and chiral perturbation theory
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