A dibaryon is a particle made up of six quarks. It has a lifetime of 10^–23 s.

Researchers have for decades searched without success for exotic bound states comprising more than three quarks. In 2011, 120 scientists from eight countries discovered the existence of a dibaryon with experiments performed at the accelerator COSY of the Forschungszentrum Jülich, Germany. In 2013, they were able to verify these findings.

Image © Forschungszentrum Jülich/SeitenPlan

• Evidence for a New Resonance from Polarized Neutron-Proton Scattering,
  P. Adlarson et al. (WASA-at-COSY Collaboration),
  Phys. Rev. Lett. 2014, 112, 202301.
  DOI: 10.1103/PhysRevLett.112.202301