Anomalies in (semi)-leptonic B decays B±→τ±ν, B±→Dτ±ν and B±→D*τ±ν, and possible resolution with sterile neutrinoG.C. acknowledges the support by FONDECYT (Chile) (1130599), The work of C.S.K. was supported in part by the NRF grant funded by the Korean government of the MEST (2016R1D1A1A02936965)

Cvetič, Gorazd (Department of Physics, Universidad Técnica Federico Santa María, Valparaíso, Chile) ; Halzen, Francis (Wisconsin IceCube Particle Astrophysics Center and Department of Physics, University of Wisconsin, Madison, WI, 53706, USA) ; Kim, C. S. (Department of Physics and IPAP, Yonsei University, Seoul 120-749, Korea) ; Oh, Sechul (University College, Yonsei University, Incheon 406-840, Korea)

24 October 2017

Abstract: The universality of the weak interactions can be tested in semileptonic b→c transitions, and in particular in the ratios R(D(*)) ≡ Γ(B→D(*)τν)/Γ(B→D(*)lν) (where l=μ or e). Due to the recent differences between the experimental measurements of these observables by BaBar, Belle and LHCb on the one hand and the Standard Model predicted values on the other hand, we study the predicted ratios R(D(*))=Γ(B→D(*)τ+“missing”)/Γ(B→D(*)lν) in scenarios with an additional sterile heavy neutrino of mass ∼1 GeV. Further, we evaluate the newly defined ratio R(0)≡Γ(B→τ+“missing”)/Γ(B→μν) in such scenarios, in view of the future possibilities of measuring the quantity at Belle-II.


Published in: Chinese Phys. C 41 (2017) 113102
Published by: Institute of Physics Publishing/Chinese Academy of Sciences
DOI: 10.1088/1674-1137/41/11/113102
arXiv: 1702.04335
License: CC-BY-3.0



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