In contrast to other particles of this type, in which the three quarks perform an elaborate dance around each other, a particle with two heavy quarks is expected to act like a planetary system, where the heavy quarks are like two stars orbiting one around the other, with the lighter quark orbiting around this binary system.
Scientists have detected a new particle at the Large Hadron Collider at Cern.
The discovery will help researchers learn more about the so-called “strong force” which holds the centres of atoms together.
The existence of the new particle was theoretically predicted but this is the first time it has been identified.
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