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- Title
Simplified models of vector SU(4) leptoquarks at the TeV.
- Authors
Barbieri, Riccardo; Cornella, Claudia; Isidori, Gino
- Abstract
Assuming confirmation of the anomalies in semi-leptonic B-decays, their explanation in terms of the exchange of a massive vector leptoquark field, U μ a , of charge 2/3, appears to require the inclusion of U μ a in the vector multiplet of the adjoint of Pati–Salam SU(4), G μ A , as well as the introduction of vector-like fermions, F j , in the fundamental of SU(4). We consider simplified models characterised by the nature of the SU(4) symmetry (global or local), by the number of vector-like fermions, and by the couplings of the Higgs boson to SM fermions (direct or induced by mixing with the vector-like fermions). In all cases, we implement a minimal breaking of a U (2) f n flavour symmetry, with a single motivated exception. We then perform a global fit including the main observables sensitive to exchanges of the G μ A at tree level and in loops dominated by logs insensitive to the UV completion.
- Subjects
LEPTOQUARKS; HIGGS bosons; VECTOR fields; FERMIONS
- Publication
European Physical Journal C -- Particles & Fields, 2022, Vol 82, Issue 12, p1
- ISSN
1434-6044
- Publication type
Article
- DOI
10.1140/epjc/s10052-022-11086-2