Particle Physics any of four short-lived mesons that are positive, negative, or neutral and have a mass of 495 MeV/c (about 970 times that of an electron)
Origin of kaonKa (the letter K) + (mes)on
Any of a group of four mesons, one positively charged and one negatively charged, having a mass 966 times that of an electron, and two electrically neutral, having a mass 974 times that of an electron. The two charged kaons have the same mean lifetime, about 1.24 × 10−10 second; the two neutral kaons have lifetimes of about 9 × 10−11 second and 5 × 10−8 second. Also called K meson.
Origin of kaonka, pronunciation of the letter K + –on1.
- (physics) any of four unstable subatomic particles, mesons, they are a combination of a strange quark or antiquark and either an up or down quark or antiquark
- K0: strange quark + down antiquark
- K0* (antiparticle of K0): down quark + strange antiquark
- K+: strange quark + up antiquark
- K- (antiparticle of K+): up quark + strange antiquark
From contracted pronunciation of K-meson
- Karlsruhe ontology