Abstract
We discuss the modes B→K(⁎)νν¯ in the context of non-standard neutrino interactions that add incoherently to the SM rates. We consider two scenarios: an additional light neutrino; and neutrino lepton flavour violation. We find that an additional light neutrino that interacts with SM fields via a non-universal Z′ can increase RK(⁎)ν by up to a factor of two without conflicting with Bs−B¯s mixing. This model then predicts rates for Bs→τ+τ− up to six times larger than the SM. In the context of neutrino lepton flavour violation mediated by leptoquarks we find that the current experimental upper bounds on RK(⁎)ν are already more constraining than direct bounds from Bs→τℓ and B→K(⁎)τℓ modes for ℓ=e,μ.
Highlights
Rare B decays play an important role in understanding the dynamics of the standard model (SM) as well as being a fertile ground for the search for new physics
We consider possible contributions from neutrino flavour violating final states in the context of scalar and vector leptoquarks. These contributions are correlated to the charged lepton flavour violating (CLFV) modes Bs → and B → K(∗) and we find that the current limits on B → K(∗)ννare more restrictive for modes with tau-leptons
We have studied the modes B → K(∗)ννin the context of non-standard neutrino interactions
Summary
Rare B decays play an important role in understanding the dynamics of the standard model (SM) as well as being a fertile ground for the search for new physics. We consider possible contributions from neutrino flavour violating final states in the context of scalar and vector leptoquarks These contributions are correlated to the charged lepton flavour violating (CLFV) modes Bs → and B → K(∗) and we find that the current limits on B → K(∗)ννare more restrictive for modes with tau-leptons. These results are usually presented as ratios, for which we obtain.
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