The announcement was made just a few days ago about the discovery of a never previously observed baryon, with a mass close to that of the lithium atom. Physicists Claude Amsler, Vincenzo Chiochia and Ernest Aguilò of CERN in Geneva "played" with the LHC, the same tool used for the Higgs boson search. Researchers say the discovery of the second of three baryons composed of usb quarks is important to confirm the theory that explains how quarks bind together and how the strong force, one of the four forces existing in nature, helps creating these elusive particles.