An unstable subatomic particle classified as a baryon, heavier than the neutron and proton.
- The baryon classification took on new members, including particles more massive than the proton called hyperons.
- We now call these particles ‘kaons’ and ‘lambda hyperons,’ but at the time they were simple ‘strange particles.’
- The lightest particles were named leptons, those with medium mass, mesons, heavier particles were called baryons, and the heaviest particles of all, hyperons.
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