Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/xmlui/handle/123456789/22061
Title: D* polarization as a probe to discriminate new physics in (B)over-bar -> D*tau(nu)over-bar
Authors: ALOK, AK
KUMAR, D
KUMBHAKAR, S
SANKAR, SU
Keywords: R-K
Anomalies
Puzzles
Issue Date: 2017
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.
URI: http://dx.doi.org/10.1103/PhysRevD.95.115038
http://localhost:8080/xmlui/handle/123456789/22061
ISSN: 2470-0010
2470-0029
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