Pertubative QCD in B_s $\rightarrow$ $\phi$ $\phi$

Abstract.

In this research, the hadronic decay of $B_{s}\rightarrow \phi \phi$ is analyzed by using the QCD factorization (QCDF) and pertubative QCD (pQCD). The experimental branching ratio of this decay is $1.9\times 10^{-5}$ and our results according to the QCDF method and pQCD are $(0.05\pm 0.02)\times 10^{-5}$ and $(1.7\pm 0.01)\times 10^{-5}$ , respectively. We consider that the branching ratio of pQCD is in agreement with available experimental data.