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A bstract We provide a combined explanation of the increasingly tantalizing B -meson anomalies, both in R₊^ () R K ∗ and R₃^ () R D ∗, in the Pati-Salam model with minimal matter content. This well-known model, based on the gauge group SU (4) LC × SU (2) L × SU (2) R, naturally contains a variety of scalar leptoquarks with related and restricted couplings. In particular we show that the seesaw-motivated scalar leptoquark within the representation (10 10 ¯, 3, 1) and its right-handed parity partner (10 10 ¯, 1, 3) can solve both anomalies while making testable predictions for related observables such as B → Kνν and B → Kμτ. The solution of the R₊^ () R K ∗ anomaly alone can be related to a type-II seesaw neutrino mass structure. Explaining also R₃^ () R D ∗ requires the existence of a light right-handed neutrino, which constrains the UV structure of the model.
Heeck et al. (Sat,) studied this question.