Scalar resonances: scattering and production amplitudes

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dc.creatorBoito, D. R.
dc.creatorRobilotta, M. R.
dc.date2007-05-22
dc.date2007-10-08
dc.date.accessioned2026-07-07T10:55:46Z
dc.date.available2026-07-07T10:55:46Z
dc.descriptionScattering and production amplitudes involving scalar resonances are known, according to Watson's theorem, to share the same phase $δ(s)$. We show that, at low energies, the production amplitude is fully determined by the combination of $δ(s)$ with another phase $ω(s)$, which describes intermediate two-meson propagation and is theoretically unambiguous. Our main result is a simple and almost model independent expression, which generalizes the usual $K$-matrix unitarization procedure and is suited to be used in analyses of production data involving scalar resonances.
dc.description10 pages, 4 figures. Minor changes, references added, version to appear in Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/0705.3260
dc.identifierhttp://arxiv.org/abs/0705.3260
dc.identifierPhys.Rev.D76:094011,2007
dc.identifierdoi:10.1103/PhysRevD.76.094011
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/186187
dc.subjectHigh Energy Physics - Phenomenology
dc.titleScalar resonances: scattering and production amplitudes
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