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|Title:||D* polarization as a probe to discriminate new physics in (B)over-bar -> D*tau(nu)over-bar|
|Publisher:||AMER PHYSICAL SOC|
|Citation:||PHYSICAL REVIEW D,95(11)|
|Abstract:||The confirmation of excess in R-D* at the LHCb is an indication of lepton flavor nonuniversality. Various different new physics operators and their coupling strengths, which provide a good fit to R-D, R-D*, and q(2) spectra, were identified previously. In this work, we try to find angular observables in (B) over bar -> D*tau(nu) over bar which enable us to distinguish between these new physics operators. We find that the D* polarization fraction f(L)(q(2)) is a good discriminant of scalar and tensor new physics operators. The change in < f(L)(q(2))>, induced by scalar and tensor operators, is about 3 times larger than the expected uncertainty in the upcoming Belle measurement.|
|Appears in Collections:||Article|
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