Abstract
© 2021, The Author(s).Decays of B mesons with leptons in the final state offer an interesting laboratory to search for possible effects of physics from beyond the Standard Model. In view of puzzling patterns in experimental data, the violation of lepton flavour universality is an interesting option. We present a strategy, utilising ratios of leptonic and semileptonic B decays, where the elements | Vub| and | Vcb| of the Cabibbo–Kobayashi–Maskawa (CKM) matrix cancel, to constrain the short-distance coefficients of (pseudo)-scalar, vector and tensor operator contributions. The individual branching ratios allow us then to extract also the CKM matrix elements, even in the presence of new-physics contributions. Bounds on unmeasured leptonic and semileptonic decays offer important additional constraints. In our comprehensive analysis, we give also predictions for decays which have not yet been measured in a variety of scenarios.
| Original language | English |
|---|---|
| Article number | 658 |
| Journal | European Physical Journal C |
| Volume | 81 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 1 Jul 2021 |
Funding
This research has been supported by the Netherlands Foundation for Fundamental Research of Matter (FOM) programme 156, “Higgs as Probe and Portal”, and by the National Organisation for Scientific Research (NWO). GTX acknowledges support from the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under grant 396021762-TRR 257. We thank Rusa Mandal for useful discussions.
| Funders | Funder number |
|---|---|
| National Organisation for Scientific Research | |
| Netherlands Foundation for Fundamental Research of Matter | |
| Deutsche Forschungsgemeinschaft | 396021762-TRR 257 |
| Stichting voor Fundamenteel Onderzoek der Materie | 156 |
| Nederlandse Organisatie voor Wetenschappelijk Onderzoek |