dc.contributor.author |
Algueró, Marcel |
dc.contributor.author |
Capdevila, Bernat |
dc.contributor.author |
Crivellin, Andreas |
dc.contributor.author |
Descotes-Genon, Sébastien |
dc.contributor.author |
Masjuan, Pere |
dc.contributor.author |
Matias Espona, Joaquim |
dc.contributor.author |
Virto, Javier |
dc.date |
2019 |
dc.identifier |
https://ddd.uab.cat/record/223468 |
dc.identifier |
urn:10.1140/epjc/s10052-019-7216-3 |
dc.identifier |
urn:oai:ddd.uab.cat:223468 |
dc.identifier |
urn:scopus_id:85071340868 |
dc.identifier |
urn:articleid:14346052v79n8p714 |
dc.identifier |
urn:oai:egreta.uab.cat:publications/265aca6c-9737-46fd-829a-d4e7c8f9f349 |
dc.format |
application/pdf |
dc.language |
eng |
dc.publisher |
|
dc.relation |
Ministerio de Economía y Competitividad FPA-2014-55613-P |
dc.relation |
Ministerio de Economía y Competitividad FPA-2017-86989-P |
dc.relation |
Agència de Gestió d'Ajuts Universitaris i de Recerca SGR-1069 |
dc.relation |
European Commission 690575 |
dc.relation |
European Commission 674896 |
dc.relation |
European Commission 69219 |
dc.relation |
European Commission 700525 |
dc.relation |
The European Physical Journal. C, Particles and Fields ; Vol. 79, Issue 8 (August 2019), art. 714 |
dc.rights |
open access |
dc.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. |
dc.rights |
https://creativecommons.org/licenses/by/4.0/ |
dc.title |
Emerging patterns of New Physics with and without Lepton Flavour Universal contributions |
dc.type |
Article |
dc.description.abstract |
We perform a model-independent global fit to b→ sℓℓ observables to confirm existing New Physics (NP) patterns (or scenarios) and to identify new ones emerging from the inclusion of the updated LHCb and Belle measurements of R and RK∗, respectively. Our analysis, updating Refs. Capdevila et al. (J Virto JHEP 1801:093, 2018) and Algueró et al. (J Matias Phys Rev D 99(7):075017, 2019) and including these new data, suggests the presence of right-handed couplings encoded in the Wilson coefficients C9'μ and C10'μ. It also strengthens our earlier observation that a lepton flavour universality violating (LFUV) left-handed lepton coupling (C9μV=-C10μV), often preferred from the model building point of view, accommodates the data better if lepton-flavour universal (LFU) NP is allowed, in particular in C9U. Furthermore, this scenario with LFU NP provides a simple and model-independent connection to the b→ cτν anomalies, showing a preference of ≈7σ with respect to the SM. It may also explain why fits to the whole set of b→ sℓℓ data or to the subset of LFUV data exhibit stronger preferences for different NP scenarios. Finally, motivated by Z models with vector-like quarks, we propose four new scenarios with LFU and LFUV NP contributions that give a very good fit to data. |