Search for $B \to \phi \phi K$ decays at Belle

We report measurements of the branching fraction and CP violation asymmetry in $B \to \phi \phi K$ decays using the $e^+ e^-$ collision data that correspond to 772 million $B\bar{B}$ pairs collected by the Belle experiment at KEK. These decays are mediated by the FCNC transition $b \to s \bar{s} s$. It is suggested that one can observe large CP violation in the decays owing to the interference of potential non-SM amplitudes appearing in the quantum loop with the $b \to c$ tree-level transition of $B \to \eta_c K$, $\eta_c \to \phi \phi$. The results supersede the earlier Belle's measurement with nine times larger statistics and refined analysis techniques.