Study of some B_s to f_0(980) decays in the fourth generation model

Details Study of some B_s to f_0(980) decays in the fourth generation model Study of some B_s to f_0(980) decays in the fourth generation model

2011-04-25

arxiv.org/abs/1104.4739v2

Phys.Rev.D84:014019,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 5 figures, minor changes in the text, added few references, to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.84.014019

We study some non leptonic and semileptonic decays of $B_s$ meson into a final scalar meson $f_0(980)$ in the fourth quark generation model. Since the $f_0(980)$ meson is dominantly composed of ($s \bar s $) pair, the mixing induced CP asymmetry in the decay mode $B_s \to J/\psi f_0(980)$ would {\it a priori} give $\sin 2 \beta_s$, where $\beta_s$ is the $B_s-\bar B_s$ mixing phase. In the standard model this asymmetry is expected to be vanishingly small. We find that in the fourth generation model a large mixing induced CP asymmetry could be possible for this process. Similarly the branching ratios of the rare semileptonic decays $B_s \to f_0(980) l^+ l^-$ and $B_s \to f_0(980) \nu \bar \nu$ are found to be enhanced significantly from their corresponding standard model values.

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