Observation of the $B_s^0\to {\chi }_{c1}(3872){\pi }^{+}{\pi }^{-}$ decay

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1045

The first observation of the $B_s^0\to \left({\chi }_{c1}(3872)\to J/\psi {\pi }^{+}{\pi }^{-}\right){\pi }^{+}{\pi }^{-}$ decay is reported using proton-proton collision data, corresponding to int…