Definition of kaon
: an unstable meson that occurs in both charged and neutral forms and is about 970 times more massive than an electron
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An experiment in 1964 involving exotic particles called kaons violated charge-parity symmetry.
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The Xi decays into a particle called the lambda baryon and three lighter particles, the K- (or kaon) and two pions.
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The most famous of these two-quark particles are kaons and pions.
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