Search for new physics in $ΔS = 2$ two - body (VV, PP, VP) decays of the B^- - meson

Details Search for new physics in $ΔS = 2$ two - body (VV, PP, VP) decays of the B^- - meson Search for new physics in $ΔS = 2$ two - body (VV, PP, VP) decays of the B^- - meson

2000-07-13

arxiv.org/abs/hep-ph/0007132v1

Phys.Rev. D62 (2000) 117702

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages

Scientific paper

10.1103/PhysRevD.62.117702

The $\Delta S = 2$ $b \to \bar d ss$ transition proceeds via the box - diagram in the Standard Model with a branching ratio calculated to be below $10^{-11}$, thus providing an appropriate testing ground for physics beyond the Standard Model. We analyze the $\Delta S = 2$ two - body $B^- \to K^{*-} \bar K^{*0}$, $B^- \to K^- \bar K^{0}$, $B^- \to K^{*-} \bar K^{0}$ and $B^- \to K^{-} \bar K^{*0}$ exclusive decays which are driven by the $b \to \bar d ss$ transition, both in the Standard Model and in several extensions of it. The models considered are the minimal supersymmetric model with and without ${\cal R}$ parity conservation and two Higgs doublet models. All four modes are found to have a branching ratio of the order of $10^{-13}$ in the Standard Model, while the expected branching ratio in the different extensions vary between $10^{-9} - 10^{-6}$.

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