Learning Notebook - David Rostcheck

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Notes	In particle physics, mesons are hadronic subatomic particles composed of one quark and one antiquark, bound together by the strong interaction. Because mesons are composed of quark sub-particles, they have a physical size, with a diameter of roughly one fermi, which is about two thirds the size of a proton or neutron. All mesons are unstable, with the longest-lived lasting for only a few hundredths of a microsecond. Charged mesons decay (sometimes through mediating particles) to form electrons and neutrinos. Uncharged mesons may decay to photons. Both of these decays imply that color is no longer a property of the byproducts.
Personal Notes	Mesons are part of the hadron particle family, and are defined simply as particles composed of two quarks. Some experiments show evidence of exotic mesons, which do not have the conventional valence quark content of one quark and one antiquark. conventional two-quark mesons are bosons. They are fermions. Mesons are the associated quantum-field particles that transmit the nuclear force between hadrons that pull those together into a nucleus
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