Dalitz analysis of the three-body charmless decaysB+→K+π+π−andB+→K+K+K−

We report results on the Dalitz analysis of three-body charmless $B^{+}\to K^{+}{\pi }^{+}{\pi }^{-}$ and $B^{+}\to K^{+}{K}^{+}{K}^{-}$ decays based on a $140{\mathrm{fb}}^{-1}$ data sample collected with the Belle detector. Measurements of branching fractions for quasi-two-body decays to scalar-pseudoscalar states: $B^{+}\to f_0(980)K^{+}$, $B^{+}\to K_0^{*}(1430{)}^0{\pi }^{+}$, and to vector-pseudoscalar states: $B^{+}\to K^{*}(892{)}^0{\pi }^{+}$, $B^{+}\to {\rho }^0{K}^{+}$, $B^{+}\to \varphi K^{+}$ are presented. Upper limits on decays to some pseudoscalar-tensor final states are reported. We also report the measurement of the $B^{+}\to {\chi }_{c0}{K}^{+}$ branching fraction in two ${\chi }_{c0}$ decays channels: ${\chi }_{c0}\to {\pi }^{+}{\pi }^{-}$ and ${\chi }_{c0}\to K^{+}{K}^{-}$.