Signals of Supersymmetric Flavour Models in B Physics

Details Signals of Supersymmetric Flavour Models in B Physics Signals of Supersymmetric Flavour Models in B Physics

2001-04-10

arxiv.org/abs/hep-ph/0104101v1

Phys.Rev. D64 (2001) 075005

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 7 figures, 3 of which in color

Scientific paper

10.1103/PhysRevD.64.075005

If the mechanism of Supersymmetry breaking is not flavour blind, some flavour symmetry is likely to be needed to prevent excessive flavour changing neutral current effects. We discuss two flavour models (based respectively on a U(2) and on a SU(3) horizontal symmetry) providing a good fit to fermion masses and mixings and particularly constraining the supersymmetry soft breaking terms. We show that, while reproducing successfully the Standard Model fit of the unitarity triangle, it is possible to obtain sizable deviations from the Standard Model predictions for three very clean B-physics observables: the time dependent CP asymmetries in $B_d \to J/\psi K^0$ and in $B_s \to J/\psi \phi$ and the $B_s-\bar{B}_s$ mass difference. Our analysis exhibits with two explicit realizations that in supersymmetric theories with a new flavour structure in addition to the Yukawa matrices there exist concrete potentialities for revealing supersymmetry indirectly in theoretically clean $B$-physics observables.

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