The CP Conserving Contribution to $K_{L} \to \pi^{0}\nu\overline\nu$ in the standard model

The rare decay $K_L\to\pi^0\nu\bar\nu$ is dominated by direct CP violation and can be computed with extraordinarily high precision. In principle also a CP conserving contribution to this process can arise within the Standard Model. We clarify the structure of the CP conserving mechanism, analyzing b...

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Detalles Bibliográficos
Autores principales: Buchalla, Gerhard, Isidori, Gino
Lenguaje:eng
Publicado: 1998
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/S0370-2693(98)01088-0
http://cds.cern.ch/record/358390
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author Buchalla, Gerhard
Isidori, Gino
author_facet Buchalla, Gerhard
Isidori, Gino
author_sort Buchalla, Gerhard
collection CERN
description The rare decay $K_L\to\pi^0\nu\bar\nu$ is dominated by direct CP violation and can be computed with extraordinarily high precision. In principle also a CP conserving contribution to this process can arise within the Standard Model. We clarify the structure of the CP conserving mechanism, analyzing both its short-distance and long-distance components. It is pointed out that the calculation of the CP conserving amplitude, although sensitive in part to nonperturbative physics, is rather well under control. The resulting CP conserving contribution to the rate for $K_L\to\pi^0\nu\bar\nu$ turns out to be very strongly suppressed due to several factors, which we discuss in detail.
id cern-358390
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1998
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spelling cern-3583902023-03-29T12:59:06Zdoi:10.1016/S0370-2693(98)01088-0http://cds.cern.ch/record/358390engBuchalla, GerhardIsidori, GinoThe CP Conserving Contribution to $K_{L} \to \pi^{0}\nu\overline\nu$ in the standard modelParticle Physics - PhenomenologyThe rare decay $K_L\to\pi^0\nu\bar\nu$ is dominated by direct CP violation and can be computed with extraordinarily high precision. In principle also a CP conserving contribution to this process can arise within the Standard Model. We clarify the structure of the CP conserving mechanism, analyzing both its short-distance and long-distance components. It is pointed out that the calculation of the CP conserving amplitude, although sensitive in part to nonperturbative physics, is rather well under control. The resulting CP conserving contribution to the rate for $K_L\to\pi^0\nu\bar\nu$ turns out to be very strongly suppressed due to several factors, which we discuss in detail.hep-ph/9806501CERN-TH-98-209LNF-98-021-Poai:cds.cern.ch:3583901998-06-29
spellingShingle Particle Physics - Phenomenology
Buchalla, Gerhard
Isidori, Gino
The CP Conserving Contribution to $K_{L} \to \pi^{0}\nu\overline\nu$ in the standard model
title The CP Conserving Contribution to $K_{L} \to \pi^{0}\nu\overline\nu$ in the standard model
title_full The CP Conserving Contribution to $K_{L} \to \pi^{0}\nu\overline\nu$ in the standard model
title_fullStr The CP Conserving Contribution to $K_{L} \to \pi^{0}\nu\overline\nu$ in the standard model
title_full_unstemmed The CP Conserving Contribution to $K_{L} \to \pi^{0}\nu\overline\nu$ in the standard model
title_short The CP Conserving Contribution to $K_{L} \to \pi^{0}\nu\overline\nu$ in the standard model
title_sort cp conserving contribution to $k_{l} \to \pi^{0}\nu\overline\nu$ in the standard model
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/S0370-2693(98)01088-0
http://cds.cern.ch/record/358390
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AT buchallagerhard cpconservingcontributiontokltopi0nuoverlinenuinthestandardmodel
AT isidorigino cpconservingcontributiontokltopi0nuoverlinenuinthestandardmodel

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