Observation of J/ψp Resonances Consistent with Pentaquark States in Λ_{b}^{0} →J/ψK^{−} p Decays

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

A new type of particle containing five quarks has been observed by the LHCb experiment.

[Phys. Rev. Lett. 115, 072001] Published Wed Aug 12, 2015