Right-handed interactions in puzzling $B$-decays

Abstract

We explain the difference between the measured decay widths of $b\to c\ddot{I}„\hat{I}½$ processes and of $B\to K\hat{I}½\bar{\hat{I}}½$ and their values predicted in the Standard Model by introducing the right-handed interactions both to quarks and to leptons. At low energy scales, in addition to the Standard Model particles, we assume the presence of an additional neutral lepton (right-handed neutrino). We then show a specific realization of such a scenario in a model with a single scalar leptoquark ($S_1$), and discuss the corresponding phenomenology.

5 pages, 2 figures, 2 tables, v2: added appendices, matches published version