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Measurement of the ration of the $B^0\rightarrow D^{*-} \tau^+ \nu_\tau$ and $B^0 \rightarrow D^{*-} \mu^+ \nu_\mu$ branching fractions using thee-prong $\tau$ decays.
Lepton universality, described in the Standard Model (SM), predicts equal coupling between gauge bosons and the three lepton families. SM extensions give additional interactions, implying in some cases a stronger coupling with the third generation of leptons. Semileptonic decays of b-hadrons provide...
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Lenguaje: | eng |
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2018
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Acceso en línea: | http://cds.cern.ch/record/2316034 |