Looking for the Unexpected: Direct CP Violation in $B \to X_{s}\gamma$ Decays

The observation of a sizable direct CP asymmetry in the inclusive decays B -> X_s gamma would be a clean signal of New Physics. In the Standard Model, this asymmetry is below 1% in magnitude. In extensions of the Standard Model with new CP-violating couplings, large asymmetries are possible witho...

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Detalles Bibliográficos
Autor principal: Neubert, Matthias
Lenguaje:eng
Publicado: 1998
Materias:
Particle Physics - Phenomenology
Acceso en línea:http://cds.cern.ch/record/356134
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author Neubert, Matthias
author_facet Neubert, Matthias
author_sort Neubert, Matthias
collection CERN
description The observation of a sizable direct CP asymmetry in the inclusive decays B -> X_s gamma would be a clean signal of New Physics. In the Standard Model, this asymmetry is below 1% in magnitude. In extensions of the Standard Model with new CP-violating couplings, large asymmetries are possible without conflicting with the experimental value of the B -> X_s gamma branching ratio. In particular, large asymmetries arise naturally in models with enhanced chromo-magnetic dipole transitions. Some generic examples of such models are explored and their implications for the semileptonic branching ratio and charm yield in B decays discussed.
id cern-356134
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1998
record_format invenio
spelling cern-3561342021-05-11T13:21:59Zhttp://cds.cern.ch/record/356134engNeubert, MatthiasLooking for the Unexpected: Direct CP Violation in $B \to X_{s}\gamma$ DecaysParticle Physics - PhenomenologyThe observation of a sizable direct CP asymmetry in the inclusive decays B -> X_s gamma would be a clean signal of New Physics. In the Standard Model, this asymmetry is below 1% in magnitude. In extensions of the Standard Model with new CP-violating couplings, large asymmetries are possible without conflicting with the experimental value of the B -> X_s gamma branching ratio. In particular, large asymmetries arise naturally in models with enhanced chromo-magnetic dipole transitions. Some generic examples of such models are explored and their implications for the semileptonic branching ratio and charm yield in B decays discussed.hep-ph/9806206CERN-TH-98-179CERN-TH-98-179oai:cds.cern.ch:3561341998-06-02
spellingShingle Particle Physics - Phenomenology
Neubert, Matthias
Looking for the Unexpected: Direct CP Violation in $B \to X_{s}\gamma$ Decays
title Looking for the Unexpected: Direct CP Violation in $B \to X_{s}\gamma$ Decays
title_full Looking for the Unexpected: Direct CP Violation in $B \to X_{s}\gamma$ Decays
title_fullStr Looking for the Unexpected: Direct CP Violation in $B \to X_{s}\gamma$ Decays
title_full_unstemmed Looking for the Unexpected: Direct CP Violation in $B \to X_{s}\gamma$ Decays
title_short Looking for the Unexpected: Direct CP Violation in $B \to X_{s}\gamma$ Decays
title_sort looking for the unexpected: direct cp violation in $b \to x_{s}\gamma$ decays
topic Particle Physics - Phenomenology
url http://cds.cern.ch/record/356134
work_keys_str_mv AT neubertmatthias lookingfortheunexpecteddirectcpviolationinbtoxsgammadecays

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