Journal article

A near-minimal leptoquark model for reconciling flavour anomalies and generating radiative neutrino masses

Innes Bigaran, John Gargalionis, Raymond R Volkas

Journal of High Energy Physics | SPRINGER | Published : 2019


We introduce two scalar leptoquarks, the SU(2) isosinglet denoted ϕ ∼ (3,1, −1/3) and the isotriplet φ ∼ (3,3, −1/3), to explain observed deviations from the standard model in semi-leptonic B-meson decays. We explore the regions of parameter space in which this model accommodates the persistent tensions in the decay observables R (∗), R (∗) , and angular observables in b → sμμ transitions. Additionally, we exploit the role of these exotics in existing models for one-loop neutrino mass generation derived from ∆L = 2 effective operators. Introducing the vector-like quark χ ∼ (3,2, −5/6) necessary for lepton-number violation, we consider the contribution of both leptoquarks to the generation ..

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University of Melbourne Researchers


Funding Acknowledgements

This work was supported in part by the Australian Research Council and the Australian Government Research Training Program Scholarship initiative. We also acknowledge useful discussions with Joshua P Ellis, Iulia Popa-Mateiu, Michael A Schmidt, and Phillip Urquijo. IB would also like to thank F. Staub and A. Vicente for their support on the SARAH forum, and Denner et al. for ref. [144] which was useful for analytic calculations throughout.