Anomalies in (semi)-leptonic B decays B± →τ± ν, B± →D τ± ν and B± → D* τ± ν, and possible resolution with sterile neutrino

  • The universality of the weak interactions can be tested in semileptonic bc 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.
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Gorazd Cvetic, Francis Halzen, C. S. Kim and Sechul Oh. Anomalies in (semi)-leptonic B decays B± →τ± ν, B± →D τ± ν and B± → D* τ± ν, and possible resolution with sterile neutrino[J]. Chinese Physics C, 2017, 41(11): 113102. doi: 10.1088/1674-1137/41/11/113102
Gorazd Cvetic, Francis Halzen, C. S. Kim and Sechul Oh. Anomalies in (semi)-leptonic B decays B± →τ± ν, B± →D τ± ν and B± → D* τ± ν, and possible resolution with sterile neutrino[J]. Chinese Physics C, 2017, 41(11): 113102.  doi: 10.1088/1674-1137/41/11/113102 shu
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Received: 2017-07-12
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    G.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)

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Anomalies in (semi)-leptonic B decays B± →τ± ν, B± →D τ± ν and B± → D* τ± ν, and possible resolution with sterile neutrino

    Corresponding author: Francis Halzen, gorazd.cvetic@usm.cl
    Corresponding author: C. S. Kim, gorazd.cvetic@usm.cl
    Corresponding author: Sechul Oh, gorazd.cvetic@usm.cl
  • 1.  Wisconsin IceCube Particle Astrophysics Center and Department of Physics, University of Wisconsin, Madison, WI, 53706, USA
  • 2.  Department of Physics and IPAP, Yonsei University, Seoul 120-749, Korea
  • 3.  University College, Yonsei University, Incheon 406-840, Korea
Fund Project:  G.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)

Abstract: The universality of the weak interactions can be tested in semileptonic bc 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.

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