4-11 July 2012
Melbourne Convention and Exhibition Centre
Australia/Melbourne timezone
ICHEP2012 - 36th International Conference for High Energy Physics

Leptonic and semileptonic B decays at Belle

5 Jul 2012, 10:00
Room 220 (Melbourne Convention and Exhibition Centre)

Room 220

Melbourne Convention and Exhibition Centre

Melbourne Australia
Parallel Sessions Track 7. CP Violation, CKM, Rare Decays, Meson Spectroscopy TR5 & TR7 - Room 220 - B Physics and CP Violation, etc.


Mr Youngmin Yook (Yonsei University)


We present a measurement of the decay $B\to\tau\nu$ using the full Belle data set including $772 \times 10^6$ $B\bar{B}$ collected at the KEKB asymmetric-energy $e^+e^-$ collider. The $B\bar B$ pair events are tagged by fully reconstructing one B meson decaying in a hadronic mode and detecting the $B\to\tau\nu$ candidate in the recoil. We obtain the branching fraction for $B\to\tau\nu$ and present a direct determination of the product of the B meson decay constant $f_B$ and the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element $|V_{ub}|$. The resulting constraints on the charged Higgs boson are also discussed.

Primary author

Mr Youngmin Yook (Yonsei University)

Presentation materials