The baffling semileptonic branching ratio of B mesons

The apparent gap between the measured and the expected value for the semileptonic branching ratio of $B$ mesons has become more serious over the last year. This is due to the improved quality of the data and to the increasing maturity of the theoretical treatment of non-perturbative corrections. We...

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Detalles Bibliográficos
Autores principales: Bigi, Ikaros I.Y., Blok, Boris, Shifman, Mikhail A., Vainshtein, Arkady I.
Lenguaje:eng
Publicado: 1994
Materias:
Particle Physics - Theory
Acceso en línea:https://dx.doi.org/10.1016/0370-2693(94)91239-4
http://cds.cern.ch/record/690655
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author Bigi, Ikaros I.Y.
Blok, Boris
Shifman, Mikhail A.
Vainshtein, Arkady I.
author_facet Bigi, Ikaros I.Y.
Blok, Boris
Shifman, Mikhail A.
Vainshtein, Arkady I.
author_sort Bigi, Ikaros I.Y.
collection CERN
description The apparent gap between the measured and the expected value for the semileptonic branching ratio of $B$ mesons has become more serious over the last year. This is due to the improved quality of the data and to the increasing maturity of the theoretical treatment of non-perturbative corrections. We discuss various theoretical options to reduce the semileptonic $B$ branching ratio; among the more spectacular resolutions of the apparent puzzle is the possibility of an un-orthodox enhancement in non-perturbative corrections or even of an intervention by `New Physics'. Phenomenological implications of such scenarios are pointed out.
id cern-690655
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1994
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spelling cern-6906552023-03-14T16:34:36Zdoi:10.1016/0370-2693(94)91239-4http://cds.cern.ch/record/690655engBigi, Ikaros I.Y.Blok, BorisShifman, Mikhail A.Vainshtein, Arkady I.The baffling semileptonic branching ratio of B mesonsParticle Physics - TheoryThe apparent gap between the measured and the expected value for the semileptonic branching ratio of $B$ mesons has become more serious over the last year. This is due to the improved quality of the data and to the increasing maturity of the theoretical treatment of non-perturbative corrections. We discuss various theoretical options to reduce the semileptonic $B$ branching ratio; among the more spectacular resolutions of the apparent puzzle is the possibility of an un-orthodox enhancement in non-perturbative corrections or even of an intervention by `New Physics'. Phenomenological implications of such scenarios are pointed out.The apparent gap between the measured and the expected value for the semileptonic branching ratio of B mesons has become more serious of r the last year. This is due to the improved quality of the data and to the increasing maturity of the theoretical treatment of nonperturbative corrections. We discuss various theoretical options to reduce the semileptonic B branching ratio; among the more spectacular resolutions of the apparent puzzle is the possibility of an unorthodox enhancement in nonperturbative corrections or even of an intervention by “New Physics”. Phenomenological implications of such scenarios are pointed out.hep-ph/9311339CERN-TH-7082-93UND-HEP-93-BIG06UMN-TH-1225-93TPI-MINN-95-53-TTECHNION-PH-93-40CERN-TH-7082-93TECHNION-PH-93-40TPI-MINN-93-53-TUMN-TH-1225UND-HEP-93-BIG-06oai:cds.cern.ch:6906551994
spellingShingle Particle Physics - Theory
Bigi, Ikaros I.Y.
Blok, Boris
Shifman, Mikhail A.
Vainshtein, Arkady I.
The baffling semileptonic branching ratio of B mesons
title The baffling semileptonic branching ratio of B mesons
title_full The baffling semileptonic branching ratio of B mesons
title_fullStr The baffling semileptonic branching ratio of B mesons
title_full_unstemmed The baffling semileptonic branching ratio of B mesons
title_short The baffling semileptonic branching ratio of B mesons
title_sort baffling semileptonic branching ratio of b mesons
topic Particle Physics - Theory
url https://dx.doi.org/10.1016/0370-2693(94)91239-4
http://cds.cern.ch/record/690655
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