Evidence for the existence of a flavor-sextet charmed meson?

Feng-Kun Guo, Bing-Song Zou

Recently, the LHCb Collaboration reported a signal for a new resonance in the $D_s^{+}{\pi }^{\pm }$ invariant mass distribution in the decays $B\to {\bar{D}}^{(\ast )}{D}_s^{+}{\pi }^{+}{\pi }^{-}$ (arXiv:2411…