U(2) and minimal flavour violation in supersymmetry

Riccardo Barbieri, Gino Isidori, Joel Jones-Pérez, Paolo Lodone, David M. Straub

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

206 Citas (Scopus)


Rather than sticking to the full U(3)3 approximate symmetry normally invoked in Minimal Flavour Violation, we analyze the consequences on the current flavour data of a suitably broken U(2)3 symmetry acting on the first two generations of quarks and squarks. A definite correlation emerges between the ΔF=2 amplitudes M(K0 → K̄0), M(Bd → B̄d) and M(Bs → B̄s), which can resolve the current tension between M(K0 → K̄0) and M(Bd → B̄d), while predicting M(Bs → B̄s). In particular, the CP violating asymmetry in Bs→ψφ is predicted to be positive Sψφ=0.12±0.05 and above its Standard Model value (S ψφ=0.041±0.002). The preferred region for the gluino and the left-handed sbottom masses is below about 1÷1.5 TeV. An existence proof of a dynamical model realizing the U(2)3 picture is outlined.

Idioma originalInglés
Número de artículo1725
Páginas (desde-hasta)1-11
Número de páginas11
PublicaciónEuropean Physical Journal C
EstadoPublicada - ago. 2011
Publicado de forma externa


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