Source (CERN)
The Large Hadron Collider beauty (LHCb) collaboration today announced results that confirm the existence of exotic hadrons a type of matter that cannot be classified within the traditional quark model.
Hadrons are subatomic particles that can take part in the strong interaction the force that binds protons inside the nuclei of atoms. Physicists have theorized since the 1960s, and ample experimental evidence since has confirmed, that hadrons are made up of quarks and antiquarks that determine their properties. A subset of hadrons, called mesons, is formed from quark-antiquark pairs, while the rest baryons are made up of three quarks.