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plural hyperons
(physics) Any baryon (a three-quark particle) with a non-zero strangeness (i.e., whose composition includes one or more strange or anti-strange quarks). quotations examples
The known hyperons and their properties are listed in Table I of the companion lectures on Strange Particles. Most of these hyperons have lifetimes of the order of 10-10 sec, with the exception of the Σ0-hyperon whose electromagnetic decay has an exceedingly short lifetime.
1965, Richard Henry Dalitz, Nuclear Interactions of the Hyperons, page 1
What is particularly noticeable is the steep rise in hyperon populations as the limiting mass is approached.
2000, Norman K. Glendenning, Compact Stars: Nuclear Physics, Particle Physics, and General Relativity, page 264
The properties of the Λ0 hyperon and of the Κ0 were more precisely determined. The charged counterparts of the neutral Κ particle were also found as well as the charged Σ hyperons and their neutral counterpart.
2001, M.K. Sundaresan, Handbook of Particle Physics, page 21