Quantum numbers of the $X(3872)$ state and orbital angular momentum in its ${\rho }^{0}J\psi$ decay

LHCb collaboration, R. Aaij, C. Abellan Beteta +619

Angular correlations in $B^{+}\to X(3872)K^{+}$ decays, with $X(3872)\to {\rho }^{0}J/\psi$, ${\rho }^0\to {\pi }^{+}{\pi }^{-}$ and $J/\psi \to {\mu }^{+}{\mu }^{-}$, are used to measure orbital angular momentum contributions and to…