cascade baryon

cascade baryon

n.
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Two experiments running simultaneously at the Fermi National Accelerator Laboratory in Batavia, Ill., have observed a new particle called the cascade baryon. It is one of the most massive examples yet of a baryon--a class of particles made of three quarks held together by the strong nuclear force--and the first to contain one quark from each of the three known families, or generations, of these elementary particles.
Physicists had long conjectured that a down quark could combine with a strange and a bottom quark to form the three-generation cascade baryon.
Recent improvements that have enabled the Tevatron to smash together protons and antiprotons in unprecedented numbers made possible the creation of the cascade baryon, he adds.--D.C.