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In particle physics, Ξ (Xi) is a name given to a range of baryons with one up or down quark and two heavier quarks. They are sometimes called the cascade particles because of their unstable state, they decay rapidly into lighter particles through a chain of decays. The first discovery of the Xi particle was at Brookhaven National Laboratory in 1964.
Additional recommended knowledge
The Ξ-b particle is also known as the cascade B particle and contains quarks from all three families.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Xi_particle". A list of authors is available in Wikipedia.|