A global fit to b ? c??($)over-bar anomalies after Moriond 2019

At Moriond 2019, Belle collaboration announced their new measurements on R-D and R-D* which are in agreement with their Standard Model (SM) predictions within 1:2 sigma. After inclusion of these measurements, the discrepancy between the world averages and the SM predictions of R-D-R-D* comes down from 4:1s to 3:1s. Here we do a global fit by taking all measurements in b -> c iota nu($) over bar transition. We find that there are seven allowed new physics solutions, each with different Lorentz structure. Further we show that it is possible to distinguish between them by means of the five observables: the t polarization fraction in the decay B -> D iota nu($) over bar, the precision measurement of RD, the forward-backward asymmetries in the decays B -> (D; D*)iota nu($) over bar and the branching ratio of Bc ->iota nu($) over bar.