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arXiv · 1802.04274

Third Family Quark-Lepton Unification at the TeV Scale

Admir Greljo·Ben A. Stefanek
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Abstract

We construct a model of quark-lepton unification at the TeV scale based on an $SU(4)$ gauge symmetry, while still having acceptable neutrino masses and enough suppression in flavor changing neutral currents. An approximate $U(2)$ flavor symmetry is an artifact of family-dependent gauge charges leading to a natural realization of the CKM mixing matrix. The model predicts sizeable violation of PMNS unitarity as well as a gauge vector leptoquark $U_1^\mu = ({\bf 3}, {\bf 1}, 2/3)$ which can be produced at the LHC -- both effects within the reach of future measurements. In addition, recently reported experimental anomalies in semi-leptonic $B$-meson decays, both in charged $b \to c \tau \nu$ and neutral $b \to s \mu \mu$ currents, can be accommodated.

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Admir Greljo, Ben A. Stefanek. 2018-02-12. Third Family Quark-Lepton Unification at the TeV Scale. https://doi.org/10.1016/j.physletb.2018.05.033

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