Determination of quantum numbers for several excited charmed mesons observed in $B^{-}\to D^{\ast +}{\pi }^{-}{\pi }^{-}$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +907

A four-body amplitude analysis of the $B^{-}\to D^{\ast +}{\pi }^{-}{\pi }^{-}$ decay is performed, where fractions and relative phases of the various resonances contributing to the decay are measu…