27-28 March 2017
ES building, Higashiyama Campus, Nagoya University
Japan timezone
B_c meson lifetime and the shape of New Physics in B -> D^(*) tau nu
Presented by Benjamin GRINSTEIN
on
27 Mar 2017
from
18:00
to
18:35
Description
We investigate a new constraint on new-physics interpretations of the anomalies observed in B -> D^(*) tau nu decays making use of the lifetime of the B_c meson. A constraint is obtained by demanding that the rate for B_c -> tau nu does not exceed the fraction of the total width that is allowed by the calculation of the lifetime in the standard model. The new constraint renders a scalar interpretation of the enhancement measured in R_D^* implausible. We also discuss the complementarity of R_{D^{(*)} and a measurement of the longitudinal polarization of the tau in the B -> D^* tau nu decay in light of our findings.
Place
Location: ES building, Higashiyama Campus, Nagoya University
Room: KMI Science Symposia (ES635)