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| Home > Articles > Published articles > Are we overlooking lepton-flavor-universal new physics in b →s ? |
(Universitat Autònoma de Barcelona. Departament de Física) (Universitat Autònoma de Barcelona. Departament de Física) (Universitat Autònoma de Barcelona. Departament de Física) (Universitat Autònoma de Barcelona. Departament de Física)| Date: | 2019 |
| Abstract: | The deviations with respect to the Standard Model that are currently observed in b→s transitions (the so-called flavor anomalies) can be interpreted in terms of different new physics (NP) scenarios within a model-independent effective approach. We reconsider the determination of NP in global fits from a different perspective by removing one implicit hypothesis of current analyses, namely, that NP is only lepton-flavor-universality violating (LFUV). We examine the roles played by LFUV NP and lepton-flavor-universal NP altogether, providing new directions to identify the possible theory beyond the SM responsible for the anomalies observed. New patterns of NP emerge due to the possibility of allowing at the same time large LFUV and lepton-flavor-universal NP contributions to C10μ, which provides a different mechanism to obey the constraint from the Bs→μ+μ- branching ratio. In this landscape of NP, we discuss how to discriminate among these scenarios in the short term, thanks to current and forthcoming observables. While the update of RK will be a major milestone to confirm the NP origin of the flavor anomalies, additional observables, in particular the LFUV angular observable Q5, turn out to be central to assessing the precise NP scenario responsible for the observed anomalies. |
| Grants: | Ministerio de Ciencia e Innovación FPA2014-55613-P Ministerio de Ciencia e Innovación FPA2017-86989-P Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1069 European Commission 690575 European Commission 674896 |
| Rights: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.  |
| Language: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Subject: | Flavor changing neutral currents ; Rare decays ; Bottom mesons ; Bottom quark ; Flavor symmetries |
| Published in: | Physical Review D, Vol. 99, Issue 7 (April 2019) , art. 75017, ISSN 2470-0029 |
