Proposal to study $B_s \to \bar D_{sJ}$ transitions
  It is proposed to clear some of the puzzles of B decay to the broad $\bar{D}^{\ast\ast}$ states by studying the corresponding decay with strange states $B_s^0 \to D_{s0}^{\ast -} \pi^+$ at LHCb. Interpretation of the results should be easier due to the narrowness of the $D_{s0}^{\ast -}$ state. 
Damir Becirevic, Alain Le Yaouanc, Luis Oliver, Jean-Claude Raynal,   Patrick Roudeau and Justine Serrano
hep-ph hep-ex hep-lat