Speaker
Ivan Nisandzic
(J. Stefan Institute)
Description
Semi-leptonic B decays are important test of the Standard Model (SM) and
present the possibility to explore the eects of physics Beyond Standard Model
(BSM). Decays involving tau leptons in the nal state are interesting due to the
tau mass eects which allow to probe the contributions to the decay rate which
are not present in the decay containing light lepton in nal state. Recently, BaBar
Collaboration observed deviations from the SM predictions in $B\to D^{(*)}\tau\nu$.
To account for the anomaly, we supplement the SM Hamiltonian with a set of
low dimensional eective operators that can in
uence the b ! c transitions.
If conrmed, the deviation leads to some interesting implications which are the
subject of our study.
Author
Ivan Nisandzic
(J. Stefan Institute)
