TeV-scale scalar leptoquarks motivated by B anomalies improve Yukawa unification in SO(10) GUT

It is common practice to explain deviations between data and Standard-Model predictions by postulating new particles at the TeV scale ad-hoc. This approach becomes much more convincing, if one successfully embeds the postulated particles into a UV completion which addresses other conceptual or phenomenological shortcomings of the SM. We present a study of an SO (10) grand unified theory which contains scalar leptoquark fields employed to explain the ``flavour anomalies'' in b s and b c decays. We find that the additional degrees of freedom improve the renormalization group evolution of the SM parameters and may explain some of the observed fermion masses. In particular, the light leptoquarks modify the renormalization-group evolution of the Yukawa couplings such that successful bottom-tau unification becomes possible in a minimal SO (10) GUT with only a 126-plet coupling to fermions.