Isospin Breaking in $K_{\ell 4}$ Decays of the Charged Kaon

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dc.creatorCuplov, V.
dc.creatorNehme, A.
dc.date2003-11-21
dc.date.accessioned2026-07-07T03:51:22Z
dc.date.available2026-07-07T03:51:22Z
dc.descriptionThe charged $K_{\ell 4}$ decay, $K^+\toπ^+π^-\ell^+ν_{\ell}$ is studied in the framework of chiral perturbation theory based on the effective Lagrangian including mesons, photons, and leptons. We give analytic expressions for the two vectorial form factors, $f$ and $g$, calculated at one-loop level in the presence of Isospin breaking effects. These expressions may then be used to disentangle the Isospin breaking part from the measured form factors and hence improve the accuracy in the determination of $ππ$ scattering parameters from $K_{\ell 4}$ experiments.
dc.description42 pages, LaTeX, 8 postscript figures, 1 table
dc.identifierhttps://arxiv.org/abs/hep-ph/0311274
dc.identifierhttp://arxiv.org/abs/hep-ph/0311274
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/43071
dc.subjectHigh Energy Physics - Phenomenology
dc.titleIsospin Breaking in $K_{\ell 4}$ Decays of the Charged Kaon
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