Phenomenology of an SU(2) × SU(2) × U(1) model with lepton-flavour non-universality

Boucenna, Sofiane M.; Celis, Alejandro; Fuentes-Martín, Javier; Vicente, Avelino; Virto Iñigo, Javier (2016). Phenomenology of an SU(2) × SU(2) × U(1) model with lepton-flavour non-universality. Journal of High Energy Physics, 2016(12), 059. Springer 10.1007/JHEP12(2016)059

[img]
Preview
Text
10.1007_JHEP12(2016)059.pdf - Published Version
Available under License Creative Commons: Attribution (CC-BY).

Download (1MB) | Preview

We investigate a gauge extension of the Standard Model in light of the observed hints of lepton universality violation in b → cℓν and b → sℓ+ℓ− decays at BaBar, Belle and LHCb. The model consists of an extended gauge group SU(2)1 × SU(2)2 × U(1)Y which breaks spontaneously around the TeV scale to the electroweak gauge group. Fermion mixing effects with vector-like fermions give rise to potentially large new physics contributions in flavour transitions mediated by W′ and Z′ bosons. This model can ease tensions in B-physics data while satisfying stringent bounds from flavour physics, and electroweak precision data. Possible ways to test the proposed new physics scenario with upcoming experimental measurements are discussed. Among other predictions, the ratios RM = Γ(B → M μ+μ−)/Γ(B → Me+e−), with M = K*, ϕ, are found to be reduced with respect to the Standard Model expectation RM ≃ 1.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Virto Iñigo, Javier

Subjects:

500 Science > 530 Physics

ISSN:

1029-8479

Publisher:

Springer

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

29 Jun 2017 15:04

Last Modified:

29 Jun 2017 15:04

Publisher DOI:

10.1007/JHEP12(2016)059

ArXiv ID:

1608.01349

BORIS DOI:

10.7892/boris.96444

URI:

https://boris.unibe.ch/id/eprint/96444

Actions (login required)

Edit item Edit item
Provide Feedback