AbstractsPhysics
Measurement of the branching ratio of $B\rightarrow D^{(\ast)}\tau\nu_\tau$ relative to $B\rightarrow D^{(\ast)}\ell\nu_\ell$ decays with hadronic tagging at Belle
| Institution: | Universität Karlsruhe |
|---|---|
| Department: | |
| Year: | 2015 |
| Keywords: | experimental particle physics, charged Higgs |
| Record ID: | 1114827 |
| Full text PDF: | http://digbib.ubka.uni-karlsruhe.de/volltexte/documents/3457121 |
Abstract
Using the full data sample on the $\Upsilon(4S)$ resonance of the Belle collaboration and a hadronic tagging method, I measure the relative semitauonic decay rates $R = 0.375^{+0.064}_{-0.063}\mathrm{(stat.)}\pm 0.026\mathrm{(syst.)}$ and $R^\ast = 0.293^{+0.039}_{-0.037}\mathrm{(stat.)}\pm 0.015\mathrm{syst.}$. These measured values are in good agreement with the theoretical expectations with a small excess.
