Bounds on the $K_{l3}$ scalar form factor from low-energy K$\pi$ phase shift

Upper and lower bounds on the scalar form factor of K/sub l3/ decay are calculated using the analytic properties of the form factor, the experimental low-energy S-wave K pi phase shift, and an estimate of the propagator Delta (t) of the divergence of the strangeness changing current at zero momentum...

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Detalles Bibliográficos
Autor principal: Bourrely, C
Lenguaje:eng
Publicado: 1973
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/0550-3213(73)90446-X
http://cds.cern.ch/record/880786
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author Bourrely, C
author_facet Bourrely, C
author_sort Bourrely, C
collection CERN
description Upper and lower bounds on the scalar form factor of K/sub l3/ decay are calculated using the analytic properties of the form factor, the experimental low-energy S-wave K pi phase shift, and an estimate of the propagator Delta (t) of the divergence of the strangeness changing current at zero momentum. The author releases the condition given by the soft-pion theorem on f(m/sub K//sup 2/) that he considered in a previous work. For this reason the new bounds are less restrictive. However they are sufficiently strong to be inconsistent with some experimental data irrespective of the fit used for K pi scattering. (18 refs).
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1973
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spelling cern-8807862019-09-30T06:29:59Zdoi:10.1016/0550-3213(73)90446-Xhttp://cds.cern.ch/record/880786engBourrely, CBounds on the $K_{l3}$ scalar form factor from low-energy K$\pi$ phase shiftParticle Physics - PhenomenologyUpper and lower bounds on the scalar form factor of K/sub l3/ decay are calculated using the analytic properties of the form factor, the experimental low-energy S-wave K pi phase shift, and an estimate of the propagator Delta (t) of the divergence of the strangeness changing current at zero momentum. The author releases the condition given by the soft-pion theorem on f(m/sub K//sup 2/) that he considered in a previous work. For this reason the new bounds are less restrictive. However they are sufficiently strong to be inconsistent with some experimental data irrespective of the fit used for K pi scattering. (18 refs).CERN-TH-1589oai:cds.cern.ch:8807861973
spellingShingle Particle Physics - Phenomenology
Bourrely, C
Bounds on the $K_{l3}$ scalar form factor from low-energy K$\pi$ phase shift
title Bounds on the $K_{l3}$ scalar form factor from low-energy K$\pi$ phase shift
title_full Bounds on the $K_{l3}$ scalar form factor from low-energy K$\pi$ phase shift
title_fullStr Bounds on the $K_{l3}$ scalar form factor from low-energy K$\pi$ phase shift
title_full_unstemmed Bounds on the $K_{l3}$ scalar form factor from low-energy K$\pi$ phase shift
title_short Bounds on the $K_{l3}$ scalar form factor from low-energy K$\pi$ phase shift
title_sort bounds on the $k_{l3}$ scalar form factor from low-energy k$\pi$ phase shift
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/0550-3213(73)90446-X
http://cds.cern.ch/record/880786
work_keys_str_mv AT bourrelyc boundsonthekl3scalarformfactorfromlowenergykpiphaseshift

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