Regular Article - Theoretical Physics
B-anomalies from flavorful U(1) extensions, safely
Fakultät Physik, TU Dortmund, Otto-Hahn-Str.4, 44221, Dortmund, Germany
2 Department of Physics and Astronomy, University of Sussex, BN1 9QH, Brighton, UK
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
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Funded by SCOAP3