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| physical object > natural object > particle > elementary particle > hadron > baryon > hyperon > sigma |
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| sigma comparison table | |||
| Subject | is a kind of | is an instance of | has definition |
|---|---|---|---|
| hyperon | radioactive particle | Baryons heavier than the neutron (this term is seldom used today). They have non-zero strangeness. Free hyperons are unstable and decay into end products, one of which is a proton. | |
| sigma | hyperon | Short-lived baryon. |