Baryon octet. Diagram organising spin-1/2 baryons into an octet according to their charge and strangeness. Particles along the same diagonal line share the same charge; positive (+1),neutral (0),or negative (-1). Particles along the same horizontal line share the same strangeness. Strangeness is a quantum property that is conserved in strong and electromagnetic interactions,between particles,but not in weak interactions. Baryons are made up of three quarks. Particles with a strangeness of 0,such as the neutron (blue) and proton (red) in the top line,contain no strange quarks. Particles with a strangeness of -1,such as the sigma baryons (green) and lambda baryon (yellow) in the middle line,contain one strange quark. Particles with a strangeness of -2,such as the xi baryons (pink) in the bottom line,contain two strange quarks | |
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Crédit: | Science Photo Library |
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