Cusps in K --> 3 pi decays

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dc.creatorColangelo, Gilberto
dc.creatorGasser, Juerg
dc.creatorKubis, Bastian
dc.creatorRusetsky, Akaki
dc.date2006-04-10
dc.date.accessioned2026-07-07T10:45:00Z
dc.date.available2026-07-07T10:45:00Z
dc.descriptionThe pion mass difference generates a pronounced cusp in K --> 3 pi decays. As has recently been pointed out by Cabibbo and Isidori, an accurate measurement of the cusp may allow one to pin down the S-wave pi pi scattering lengths to high precision. Here, we present and illustrate an effective field theory framework that allows one to determine the structure of this cusp in a straightforward manner. The strictures imposed by analyticity and unitarity are respected automatically.
dc.description14 pages, 3 figures, uses Elsevier style
dc.identifierhttps://arxiv.org/abs/hep-ph/0604084
dc.identifierhttp://arxiv.org/abs/hep-ph/0604084
dc.identifierPhys.Lett.B638:187-194,2006
dc.identifierdoi:10.1016/j.physletb.2006.05.017
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/182793
dc.subjectHigh Energy Physics - Phenomenology
dc.titleCusps in K --> 3 pi decays
dc.typetext

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