Wednesday, April 5, 2017, 2:00 pm — Small Seminar Room, Bldg. 510
In recent years, a number of interesting signals of potential new physics in semi-leptonic B-meson decays have been reported both by the B-factories
as well as the LHCb. In this talk, I will discuss these observations with a particular emphasis on the observable $R_{D^*}$, the ratio of the branching
fraction of $\bar{B} \to D^* \tau \bar{\nu}_\tau$ to that of $\bar{B} \to D^* \ell \bar{\nu}_\ell (\ell = \mu, e )$, which shows a 3.3 sigma deviation
from the Standard Model prediction. I will present an effective field theory analysis of these potential new physics signals and discuss possible ways to distinguish the various operators.
Hosted by: Amarjit Soni
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