Exotic states (X, Y, Z, Pentaquark et al.)

The latest results from the ATLAS, CMS and LHCb collaborations in the area of exotic quarkonium decays will be presented. They include: the search for a bottomonium states in the$\Upsilon (1S)\pi^+ \pi^-$ mass spectrum, the observation of a peaking structure in the $J/\psi \phi$ mass spectrum from $B^+\to j/\psi \phi K^+$ decays, a search for the X(5568) state recently claimed by the D0 collaboration and the observation of J/$\psi p$ resonances consistent with pentaquark states in $\Lambda_b\to J/\psi K^-$ decays.