Observation of J/ψϕ Structures Consistent with Exotic States from Amplitude Analysis of B^{+} →J/ψϕK^{+} Decays

Author(s): R. Aaij et al. (LHCb Collaboration)

The LHCb collaboration has identified four new structures in $B^{+}$ decays that are likely to be tetraquark states. Two of these tetraquark systems contain neither of the light $u$ and $d$ quarks.

[Phys. Rev. Lett. 118, 022003] Published Wed Jan 11, 2017