Observation of sizeable $\omega$ contribution to ${\chi }_{c1}(3872)\to {\pi }^{+}{\pi }^{-}J/\psi$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +999

Resonant structures in the dipion mass spectrum from ${\chi }_{c1}(3872)\to {\pi }^{+}{\pi }^{-}J/\psi$ decays, produced via $B^{+}\to K^{+}{\chi }_{c1}(3872)$ decays, are analyzed using proton-proton collision da…