Watson's theorem and electromagnetism in K -> pi pi decay

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dc.creatorGardner, S.
dc.creatorMeißner, Ulf-G.
dc.creatorValencia, G.
dc.date2001-03-13
dc.date.accessioned2026-07-07T11:31:05Z
dc.date.available2026-07-07T11:31:05Z
dc.descriptionWe consider what constraints unitarity and CPT invariance yield on the strong and electromagnetic phases entering K -> pi pi decay. In particular, we show that the relative size of the electromagnetically-induced changes in the I=0 and I=2 phase shifts in the two--pion final state do not depend on the explicit coupling to the pi^+ pi^- gamma channel. This demonstrates that Watson's theorem can be extended to include the presence of electromagnetism. We point out the consequences for the general structure of the K -> pi pi decay amplitudes in the presence of isospin violation.
dc.description7 pages, LaTeX, axodraw.sty
dc.identifierhttps://arxiv.org/abs/hep-ph/0103144
dc.identifierhttp://arxiv.org/abs/hep-ph/0103144
dc.identifierPhys.Lett.B508:44-50,2001
dc.identifierdoi:10.1016/S0370-2693(01)00428-2
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/197156
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.titleWatson's theorem and electromagnetism in K -> pi pi decay
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