Evidence for an excess of B -> D(*) Tau Nu decays and implications for two Higgs doublet models

<!--HTML-->Based on the full BaBar data sample, we report improved measurements of the ratios R(D(*)) = B(B -> D(*) Tau Nu)/B(B -> D(*) l Nu), where l is either e or mu. These ratios are sensitive to new physics contributions in the form of a charged Higgs boson. We measure R(D) = 0.440...

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Detalles Bibliográficos
Autor principal: Franco Sevilla, Manuel
Lenguaje:eng
Publicado: 2012
Materias:
EP Seminar
Acceso en línea:http://cds.cern.ch/record/1476042
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author Franco Sevilla, Manuel
author_facet Franco Sevilla, Manuel
author_sort Franco Sevilla, Manuel
collection CERN
description <!--HTML-->Based on the full BaBar data sample, we report improved measurements of the ratios R(D(*)) = B(B -> D(*) Tau Nu)/B(B -> D(*) l Nu), where l is either e or mu. These ratios are sensitive to new physics contributions in the form of a charged Higgs boson. We measure R(D) = 0.440 +- 0.058 +- 0.042 and R(D*) = 0.332 +- 0.024 +- 0.018, which exceed the Standard Model expectations by 2.0 sigma and 2.7 sigma, respectively. Taken together, our results disagree with these expectations at the 3.4 sigma level. This excess cannot be explained by a charged Higgs boson in the type II two-Higgs-doublet model.
id cern-1476042
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2012
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spelling cern-14760422022-11-02T22:31:32Zhttp://cds.cern.ch/record/1476042engFranco Sevilla, ManuelEvidence for an excess of B -> D(*) Tau Nu decays and implications for two Higgs doublet modelsEvidence for an excess of B -> D(*) Tau Nu decays and implications for two Higgs doublet modelsEP Seminar<!--HTML-->Based on the full BaBar data sample, we report improved measurements of the ratios R(D(*)) = B(B -> D(*) Tau Nu)/B(B -> D(*) l Nu), where l is either e or mu. These ratios are sensitive to new physics contributions in the form of a charged Higgs boson. We measure R(D) = 0.440 +- 0.058 +- 0.042 and R(D*) = 0.332 +- 0.024 +- 0.018, which exceed the Standard Model expectations by 2.0 sigma and 2.7 sigma, respectively. Taken together, our results disagree with these expectations at the 3.4 sigma level. This excess cannot be explained by a charged Higgs boson in the type II two-Higgs-doublet model.oai:cds.cern.ch:14760422012
spellingShingle EP Seminar
Franco Sevilla, Manuel
Evidence for an excess of B -> D(*) Tau Nu decays and implications for two Higgs doublet models
title Evidence for an excess of B -> D(*) Tau Nu decays and implications for two Higgs doublet models
title_full Evidence for an excess of B -> D(*) Tau Nu decays and implications for two Higgs doublet models
title_fullStr Evidence for an excess of B -> D(*) Tau Nu decays and implications for two Higgs doublet models
title_full_unstemmed Evidence for an excess of B -> D(*) Tau Nu decays and implications for two Higgs doublet models
title_short Evidence for an excess of B -> D(*) Tau Nu decays and implications for two Higgs doublet models
title_sort evidence for an excess of b -> d(*) tau nu decays and implications for two higgs doublet models
topic EP Seminar
url http://cds.cern.ch/record/1476042
work_keys_str_mv AT francosevillamanuel evidenceforanexcessofbdtaunudecaysandimplicationsfortwohiggsdoubletmodels

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