Observation of new resonances in the ${\Lambda }_b^0{\pi }^{+}{\pi }^{-}$ system

LHCb collaboration, R. Aaij, C. Abellán Beteta +910

We report the observation of a new structure in the ${\Lambda }_b^0{\pi }^{+}{\pi }^{-}$ spectrum using the full LHCb data set of $pp$ collisions, corresponding to an integrated luminosity of $9\,\mathr…