The $B\to X_sl^+l^-$ and $B\to X_s γ$ decays with the fourth generation

Details The $B\to X_sl^+l^-$ and $B\to X_s γ$ decays with the fourth generation The $B\to X_sl^+l^-$ and $B\to X_s γ$ decays with the fourth generation

1999-11-02

arxiv.org/abs/hep-ph/9911203v2

Mod.Phys.Lett. A14 (1999) 2453-2462

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 5 figures

Scientific paper

10.1142/S0217732399002558

If the fourth generation fermions exist, the new quarks could influence the branching ratios of the decays of $B\to X_s \gamma$ and $B\to X_sl^+l^-$. We obtain two solutions of the fourth generation CKM factor $V^{*}_{t^{'}s}V_{t^{'}b}$ from the decay of $B\to X_s \gamma$. We use these two solutions to calculate the new contributions of the fourth generation quark to Wilson coefficients of the decay of $B\to X_sl^+l^-$. The branching ratio and the forward-backward asymmetry of the decay of $B\to X_sl^+l^-$ in the two cases are calculated. Our results are quite different from that of SM in one case, almost same in another case. If Nature chooses the formmer, the $B$ meson decays could provide a possible test of the forth generation existence.

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