Peak shifts due to $B^{(\ast )}-{\bar{B}}^{(\ast )}$ rescattering in ${\rm Y}(5S)$ dipion transitions

Ce Meng, Kuang-Ta Chao

We study the energy distributions of dipion transitions ${\rm Y}(5S)$ to ${\rm Y}(1S,2S,3S){\pi }^{+}{\pi }^{-}$ in the final state rescattering model. Since the ${\rm Y}(5S)$ is well above the open bottom thresh…