Rescattering Effects, Isospin Relations and Electroweak Penguins in $B \to \pi K$ Decays

It is argued that, in the presence of soft final-state interactions, the diagrammatic amplitude approach adopted in many analyses of hadronic B decays into light mesons can be misleading when used to deduce the unimportance of certain decay topologies. With the example of B -> pi K decays, it is...

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Detalles Bibliográficos
Autor principal: Neubert, Matthias
Lenguaje:eng
Publicado: 1997
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/S0370-2693(98)00175-0
http://cds.cern.ch/record/339810
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author Neubert, Matthias
author_facet Neubert, Matthias
author_sort Neubert, Matthias
collection CERN
description It is argued that, in the presence of soft final-state interactions, the diagrammatic amplitude approach adopted in many analyses of hadronic B decays into light mesons can be misleading when used to deduce the unimportance of certain decay topologies. With the example of B -> pi K decays, it is shown that the neglect of so-called annihilation and colour-suppressed amplitudes (including electroweak penguins), as well as penguin contributions involving an up-quark loop, is not justified. The implications for the Fleischer-Mannel bound on the angle gamma of the unitarity triangle, and for the CP asymmetry in the decays B^+- -> pi^+- K^0, are pointed out.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1997
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spelling cern-3398102023-03-14T17:00:47Zdoi:10.1016/S0370-2693(98)00175-0http://cds.cern.ch/record/339810engNeubert, MatthiasRescattering Effects, Isospin Relations and Electroweak Penguins in $B \to \pi K$ DecaysParticle Physics - PhenomenologyIt is argued that, in the presence of soft final-state interactions, the diagrammatic amplitude approach adopted in many analyses of hadronic B decays into light mesons can be misleading when used to deduce the unimportance of certain decay topologies. With the example of B -> pi K decays, it is shown that the neglect of so-called annihilation and colour-suppressed amplitudes (including electroweak penguins), as well as penguin contributions involving an up-quark loop, is not justified. The implications for the Fleischer-Mannel bound on the angle gamma of the unitarity triangle, and for the CP asymmetry in the decays B^+- -> pi^+- K^0, are pointed out.It is argued that, in the presence of soft final-state interactions, the diagrammatic amplitude approach adopted in many analyses of hadronic B decays into light mesons can be misleading when used to deduce the unimportance of certain decay topologies. With the example of B -> pi K decays, it is shown that the neglect of so-called annihilation and colour-suppressed amplitudes (including electroweak penguins), as well as penguin contributions involving an up-quark loop, is not justified. The implications for the Fleischer--Mannel bound on the angle gamma of the unitarity triangle, and for the CP asymmetry in the decays B^+- -> pi^+- K^0, are pointed out.It is argued that, in the presence of soft final-state interactions, the diagrammatic amplitude approach adopted in many analyses of hadronic B decays into light mesons can be misleading when used to deduce the unimportance of certain decay topologies. With the example of B → πK decays, it is shown that the neglect of so-called annihilation and colour-suppressed amplitudes (including electroweak penguins), as well as penguin contributions involving an up-quark loop, is not justified. The implications for the Fleischer–Mannel bound on the angle γ of the unitarity triangle, and for the CP asymmetry in the decays B ± → π ± K 0 , are pointed out.hep-ph/9712224CERN-TH-97-342CERN-TH-97-342oai:cds.cern.ch:3398101997-12-02
spellingShingle Particle Physics - Phenomenology
Neubert, Matthias
Rescattering Effects, Isospin Relations and Electroweak Penguins in $B \to \pi K$ Decays
title Rescattering Effects, Isospin Relations and Electroweak Penguins in $B \to \pi K$ Decays
title_full Rescattering Effects, Isospin Relations and Electroweak Penguins in $B \to \pi K$ Decays
title_fullStr Rescattering Effects, Isospin Relations and Electroweak Penguins in $B \to \pi K$ Decays
title_full_unstemmed Rescattering Effects, Isospin Relations and Electroweak Penguins in $B \to \pi K$ Decays
title_short Rescattering Effects, Isospin Relations and Electroweak Penguins in $B \to \pi K$ Decays
title_sort rescattering effects, isospin relations and electroweak penguins in $b \to \pi k$ decays
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/S0370-2693(98)00175-0
http://cds.cern.ch/record/339810
work_keys_str_mv AT neubertmatthias rescatteringeffectsisospinrelationsandelectroweakpenguinsinbtopikdecays

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