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We describe a light-cone QCD sum rule calculation of the $B_s\to f_0(980)$transition form factors useful to predict the branching ratios of the raredecays $B_s \to f_0 \ell^+ \ell^-$, $B_s \to f_0 \nu \bar \nu$ and of $B_s\toJ/\psi f_0$ decay assuming factorization. We compare this channel to $B_s \toJ/\psi \phi$ as far as the possibility to determine the $B_s$ mixing phase isconcerned.

$B_s \to f_0(980)$ decays: Results from light-cone QCD Sum Rules