Besides the traditional strong and electromagnetic decay modes, ${ \Upsilon}(nS)$ meson can also decay through the weak interactions within the standard model of elementary particle. With anticipation of copious ${ \Upsilon}(nS)$ data samples at the running LHC and coming SuperKEKB experiments, the two-body nonleptonic bottom-changing ${ \Upsilon}(nS)$ ${ \to}$ $B_{ c}^{ \ast}{ \pi}$, $B_{ c}^{ \ast}K$ decays ($n$ $=$ 1, 2, 3) are investigated with perturbative QCD approach firstly. The absolute branching ratios for ${ \Upsilon}(nS)$ ${ \to}$ $B_{ c}^{ \ast}{ \pi}$ and $B_{ c}^{ \ast}K$ decays are estimated to reach up to about $10^{ -10}$ and $10^{ -11}$, respectively, which might possibly be measured by the future experiments.
Categories: hep-ph