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• n  the antiparticle of a quark

• But this time the physicists saw three jets: as they interpreted the results, two were from a quark and its antimatter equivalent, the antiquark; the third apparently from a .

News & Articles

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• Syracuse University physicists confirm existence of new type of meson
  ( Syracuse University ) Physicists in the College of Arts and Sciences have made several important discoveries regarding the basic structure of mesons -- subatomic particles long thought to be composed of one quark and one antiquark and bound together by a strong interaction.
  May 1, 2014 - EurekAlert!