Abstract
We investigate a SO(10) grand unification scenario where the complex 10-dimensional scalar multiplet, containing the Standard Model (SM) Higgs boson, resides at the TeV scale altogether. The resulting low-energy model is a 2-Higgs-doublet model augmented with two S1-type leptoquarks. The gauge-coupling unification is achieved with only one intermediate scale at which the Pati-Salam gauge group is broken down to the SM. A U(1)PQ global symmetry is also introduced, with the corresponding axion providing a solution to the strong CP problem while also being an important dark matter candidate. The proton-destabilising couplings of the light leptoquarks are forbidden by a discrete symmetry. We discuss how the simultaneous explanation for the RK(∗) , RD(∗) , and aµ anomalies comes about in the model, and investigate its phenomenological implications. Keywords: B-decay anomalies, scalar leptoquark, SO(10) grand unification, LHC, 2HDM, axions, PecceiQuinn symmetry, strong CP problem, dark matte