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Baryon octet diagram

Baryon octet diagram

C014/1716

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Credit

SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY

Caption

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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