The pentaquark is composed of four quarks and an anti-quark, which was theorized when quarks were discovered in 1960s. They have remained elusive until Tuesday.
Leon Lederman had won the prize in 1988 for discovery of muon neutrino but is better known for calling Higgs Boson the God Particle.
CERN said that the test collisions helped to set up systems that protect the collider and detectos.
The article published in the journal Physical Review Letters was a challenge for the journal's editors.
Scientists fired parallel beams of protons along the length of the collider.
Repairs could take weeks as the magnetic sector is cryogenically cooled.
The collider is expected to recommence operation in May.
