https://doi.org/10.1140/epjc/s10052-021-09957-1
Regular Article - Theoretical Physics
B-anomalies from flavorful U(1)
extensions, safely
1
Fakultät Physik, TU Dortmund, Otto-Hahn-Str.4, 44221, Dortmund, Germany
2
Department of Physics and Astronomy, University of Sussex, BN1 9QH, Brighton, UK
e
tom2.steudtner@tu-dortmund.de
Received:
22
September
2021
Accepted:
17
December
2021
Published online:
15
January
2022
extensions of the standard model with generation-dependent couplings to quarks and leptons are investigated as an explanation of anomalies in rare B-decays, with an emphasis on stability and predictivity up to the Planck scale. To these ends, we introduce three generations of vector-like standard model singlet fermions, an enlarged, flavorful scalar sector, and, possibly, right-handed neutrinos, all suitably charged under the gauge interaction. We identify several gauge-anomaly free benchmarks consistent with 
-mixing constraints, with hints for electron-muon universality violation, and the global 
fit. We further investigate the complete two-loop running of gauge, Yukawa and quartic couplings up to the Planck scale to constrain low-energy parameters and enhance the predictive power. A characteristic of models is that the 
with TeV-ish mass predominantly decays to invisibles, i.e. new fermions or neutrinos. -production can be studied at a future muon collider. While benchmarks feature predominantly left-handed couplings 
and 
, right-handed ones can be accommodated as well.
© The Author(s) 2022
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