D<sup>∗</sup> polarization as a probe to discriminate new physics in b<sup>¯</sup> ↑ d<sup>∗</sup>τν¯

Date Issued
2017-01-01
Author(s)
Sankar, S. Uma
Alok, Ashutosh Kumar
Kumar, Dinesh
Kumbhakar, Suman
Abstract
We study methods of distinguishing the new physics operators which provide a good fit to the excess measured value of RD∗. Among the angular observables, we find that the D∗ polarization fraction fL(q2) is a good discriminant of scalar and tensor new physics operators. The change in hfL(q2)i, induced by scalar and tensor operators, is about three times larger than the expected uncertainty in the upcoming Belle measurement.