We study the exclusive decays of $\overrightarrow{B}{f}_0{\mathrm{}\left(980\right)K}^{\left(*\right)}$ in the framework of perturbative QCD by identifying $f_0\mathrm{}\left(980\right)\mathrm{}$ as the composition of $\overline{s}s$ and $\mathrm{n̄}n=(ūu+\overline{d}d)/\sqrt{2}.$ We find that the influence of the $\mathrm{n̄}n$ content on the predicted branching ratios is crucial. We discuss the possible rescattering and gluonium states which could enhance the branching ratios of the considered decays. We point out that the CP asymmetry in $\overrightarrow{B}{f}_0{\mathrm{}\left(980\right)K}_{S,L}$ could be a new explorer of $\sin 2{\phi }_1.$

• Received 8 October 2002

DOI:https://doi.org/10.1103/PhysRevD.67.014012