Palatable leptoquark scenarios for lepton flavor violation in exclusive b → sℓ 1 ℓ 2 modes

We examine various scenarios that involve a light O (1 TeV) leptoquark state and select those which are compatible with the current experimental values for ℬ(B s → μμ), B(B→ Kμ μ )_large-q²,RK=B^(B→ Kμ μ )/B^(B→ Kee) , and which lead to predictions consistent with other experimental data. We show that two such scenarios are phenomenologically plausible, namely the one with a doublet of scalar leptoquarks of hypercharge 1/6, and the one with a triplet of vector leptoquarks of hypercharge 2/3. We also argue that a model with a singlet scalar leptoquark of hypercharge 1/3 is not viable. Using the present experimental data as constraints, it is shown that the exclusive lepton flavor violating decays, ℬ(B s → μτ), ℬ(B → Kμτ) and ℬ(B → K ∗ μτ), can be as large as O(10⁻⁵) .