B-anomalies from flavorful U(1) <sup>′</sup> extensions, safely

Bause, Rigo, Hiller, Gudrun, Höhne, Tim, Litim, Daniel F and Steudtner, Tom (2022) B-anomalies from flavorful U(1) <sup>′</sup> extensions, safely. European Physical Journal C, 82 (1). a42 1-22. ISSN 1434-6044

[img] PDF - Published Version
Available under License Creative Commons Attribution.

Download (1MB)


U(1) ′ 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 U(1) ′ gauge interaction. We identify several gauge-anomaly free benchmarks consistent with Bs-mixing constraints, with hints for electron-muon universality violation, and the global b→ s 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 Z′ with TeV-ish mass predominantly decays to invisibles, i.e. new fermions or neutrinos. Z′-production can be studied at a future muon collider. While benchmarks feature predominantly left-handed couplings C9μ and C10μ, right-handed ones can be accommodated as well.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
SWORD Depositor: Mx Elements Account
Depositing User: Mx Elements Account
Date Deposited: 01 Mar 2022 07:51
Last Modified: 01 Mar 2022 08:00
URI: http://sro.sussex.ac.uk/id/eprint/104631

View download statistics for this item

📧 Request an update