Baryons, which interact via the strong force and consist of a basic structure of three quarks, form a subclass of the hadrons and are subdivided into nucleons and hyperons. The ratio of the number of baryons to the number of photons (light particles) in the Universe, the baryon-to-photon ratio, which is about 10-9, is thought to have remained unchanged since the Big Bang.
Baryon number is the total number of baryons present in a system minus the total number of antibaryons.
Related category PARTICLE PHYSICS
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