Journal
PHYSICAL REVIEW D
Volume 99, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.99.095003
Keywords
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Funding
- STFC Consolidated Grant [ST/L000296/1]
- European Union's Horizon 2020 Research and Innovation programme under Marie Sklodowska-Curie [674896, 690575]
- Fondecyt [1170803]
- CONICYT PIA/Basal [FB0821]
- Chilean Grant Fondecyt [1170803]
- STFC [ST/P000711/1, ST/L000296/1] Funding Source: UKRI
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We show that, within the framework of SU(5) grand unified theories (GUTs), multiple vectorlike families at the GUT scale which transform under a gauged U(1)' (under which the three chiral families are neutral) can result in a single vectorlike family at low energies which can induce nonuniversal and flavorful Z' couplings, which can account for the B physics anomalies in R-K(*). In such theories, we show that the same muon couplings which explain R-K(*) also correct the Yukawa relation Y-e = Y-d(T) in the muon sector without the need for higher Higgs representations. To illustrate the mechanism, we construct a concrete model based on SU(5) x A(4) x Z(3) x Z(7) with two vectorlike families at the GUT scale, and two right-handed neutrinos, leading to a successful fit to quark and lepton (including neutrino) masses, mixing angles, and CP phases, where the constraints from lepton-flavor violation require Y-e to be diagonal.
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