Branching fractions of $B^{-}\to D^{-}{X}_{0,1}(2900)$ and their implications

Yan-Ke Chen, Jia-Jie Han, Qi-Fang Lü +2

The exotic states $X_{0,1}(2900)$ with the quark flavor of $cs\bar{u}\bar{d}$ are recently observed in the mass spectrum of $D^{+}{K}^{-}$ in $B^{-}\to D^{-}{D}^{+}{K}^{-}$ by the LHCb collaboration…