hyperon Nuclear Physics.
(ˈhaɪpərɒn)
[app. f. hyper- + -on1.]
Any of a group of unstable sub-atomic particles that includes all the baryons apart from the proton and neutron; any strongly interacting particle with half-integral spin and a mass greater than that of the nucleons.
| 1953 Compt. Rend. du 3me Congrès Internat. sur le Rayonnement Cosmique 269 Nomenclature more frequently used during the conference... Groups of particles... H-particles (hyperons): symbol H: particles with mass intermediate between those of the neutron and the deuteron (this definition to be revised if ‘fundamental’ particles heavier than the deuteron are found). 1963 S. Tolansky Introd. Atomic Physics (ed. 5) xxiii. 391 The baryons..can best be subdivided into two groups namely (a) the familiar nucleons,..(b) the extremely unstable somewhat heavier particles, now called hyperons. 1965 New Scientist 18 Mar. 738/3 The SU(3) symmetry relates not just the proton and the neutron one to another, but includes also in one multiplet the six particles known as hyperons. |
Hence hypeˈronic a.
| 1956 [see hypercharge]. 1969 Physical Rev. Lett. XXII. 1238/1 σ- hyperons are formed in the targets through the reactions K- + p→σ- + π+ and K- + n→σ- + π0, and upon capture by target nuclei make hyperonic atoms. 1970 Physics Lett. XXXIII. b. 230/2 The capture of the σ- hyperons takes place in atomic levels with high main quantum number n... The typical pattern of the σ hyperonic X-rays is determined by the fact that the σ- hyperon..is a strongly interacting particle. |