RM3: DIPTIMOY GHOSH, A CLOSER LOOK AT THE $R_D$ AND $R_{D^*}$ ANOMALIES
SEZIONE DI ROMA III Abstract:
The measurement of $R_D$ ($R_{D^*}$), the ratio of the branching fraction of
$\overline{B} \to D \tau \bar{\nu}_\tau (\overline{B} \to D^* \tau
\bar{\nu}_\tau)$ to that of $\overline{B} \to D l \bar{\nu}_l (\overline{B} \to
D^* l \bar{\nu}_l)$, shows $1.9 \sigma$ $(3.3 \sigma)$ deviation from its
Standard Model (SM) prediction. The combined deviation is at the level of $4
\sigma$ according to the Heavy Flavour Averaging Group.
In this talk, I will discuss an effective field theory analysis
(at the dimension-6 level) of these potential New Physics signals and ways
to distinguish the various possible explanations.
DATA: 08-02-2017
Istituto Nazionale di Fisica
Nucleare - Piazza dei Caprettari, 70 -
00186 Roma
tel. +39 066840031 - fax +39 0668307924 - email: presidenza@presid.infn.it