Measurement of the Ratio of Branching Fractions B ( B ¯ 0 → D * + τ − ν ¯ τ ) / B ( B ¯ 0 → D * + μ − ν ¯ μ )
European Organization for Nuclear Research · Universidade de Santiago de Compostela · +72 more institutions
Abstract
The branching fraction ratio R(D^{*})≡B(B[over ¯]^{0}→D^{*+}τ^{-}ν[over ¯]_{τ})/B(B[over ¯]^{0}→D^{*+}μ^{-}ν[over ¯]_{μ}) is measured using a sample of proton-proton collision data corresponding to 3.0 fb^{-1} of integrated luminosity recorded by the LHCb experiment during 2011 and 2012. The tau lepton is identified in the decay mode τ^{-}→μ^{-}ν[over ¯]_{μ}ν_{τ}. The semitauonic decay is sensitive to contributions from non-standard-model particles that preferentially couple to the third generation of fermions, in particular, Higgs-like charged scalars. A multidimensional fit to kinematic distributions of the candidate B[over ¯]^{0} decays gives R(D^{*})=0.336±0.027(stat)±0.030(syst). This result, which is the…
Citation impact
- FWCI
- 132.43
- Percentile
- 100%
- References
- 43
Authors
726Topics & keywords
- Physics
- Higgs boson
- Lepton
- Branching fraction
- Particle physics
- Standard Model (mathematical formulation)
- Physics beyond the Standard Model
- Hadron
Funding
- NSNational Science FoundationAward: CNRS/IN2P3
- CCERN
- RSRoyal Society
- RCRoyal Commission for the Exhibition of 1851
- ECEuropean Commission
- DFDeutsche Forschungsgemeinschaft
- SNSchweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
- SVStichting voor Fundamenteel Onderzoek der Materie
- NNNational Natural Science Foundation of ChinaAward: IN2P3
- RFRussian Foundation for Basic Research
- CDCoordenação de Aperfeiçoamento de Pessoal de Nível Superior
- BFBundesministerium für Bildung und Forschung
- GDGeneralitat de Catalunya
- NONederlandse Organisatie voor Wetenschappelijk Onderzoek
- MDMinisterio de Economía y Competitividad
- MOMinistry of Education and Science of the Russian Federation
- CNConselho Nacional de Desenvolvimento Científico e Tecnológico
- MMax-Planck-Gesellschaft
- NCNarodowe Centrum Nauki
- MEMinisterstwo Edukacji i Nauki
- FCFundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
- NANational Academy of Sciences of Ukraine
- CNCentre National de la Recherche ScientifiqueAward: CNRS/IN2P3
- FDFinanciadora de Estudos e Projetos
- SAScience and Technology Facilities CouncilAwards: ST/K00137X/1, ST/M004791/1, ST/K001604/1, ST/J004855/1, ST/I000097/1, ST/L006146/1, LHCb, ST/M001474/1, ST/N000250/1, ST/K001418/1, PP/E003095/1, IN2P3, ST/J005495/1, ST/L003392/1, ST/K001256/1, LHCb Upgrades, ST/K003534/1, ST/I003576/1, ST/K00140X/1, ST/N000447/1
- EREuropean Research Council
- INInstituto Nazionale di Fisica Nucleare
- INInstitut National de Physique Nucléaire et de Physique des ParticulesAward: CNRS/IN2P3
- HMH2020 Marie Skłodowska-Curie Actions