J particle
noun see J/psi particle

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • J particle — n. Particle Physics a short lived, relatively massive meson having no charge and a mass c. 6,060 times that of an electron: it is the combination of a charmed quark and its antiparticle …   English World dictionary

  • J particle — noun a neutral meson with a large mass • Syn: ↑psi particle • Hypernyms: ↑meson, ↑mesotron * * * Physics. an early name for the J/psi particle. [1970 75; named by S.C.C. Ting, allegedly from the resemblance of the letter J to the Chinese… …   Useful english dictionary

  • J particle — /dʒeɪ ˈpatɪkəl/ (say jay pahtikuhl) noun → psi particle. {J (because of the alphabetical closeness of this letter to K, already used in the name of the K meson) + particle (def. 2) …   Australian English dictionary

  • J particle — Physics. an early name for the J/psi particle. [1970 75; named by S.C.C. Ting, allegedly from the resemblance of the letter J to the Chinese character for Ting] * * * …   Universalium

  • J/psiparticle — J/psi particle (jāʹsīʹ, psīʹ) n. An electrically neutral meson having a mass 7,213 times that of the electron and a mean lifetime of approximately 1 × 10 20 seconds. Also called J particle, psi particle. * * * …   Universalium

  • j/psi particle — ˈjāˈsī noun Usage: usually capitalized J : an unstable neutral fundamental particle of the meson family that has a mass about 6000 times the mass of an electron, has an unusually long lifetime, and is thought to consist of a charmed quark and… …   Useful english dictionary

  • J/psi particle — /jay suy , psuy /, Physics. the lightest of the psi particles, the first particle to be discovered that contains a charmed quark. [1975 80; see J PARTICLE, PSI PARTICLE] * * * ▪ subatomic particle       type of meson consisting of a charmed quark …   Universalium

  • J/psi particle — noun Date: 1977 an unstable neutral fundamental particle of the meson group that has a mass about 6000 times the mass of an electron called also J particle, J/psi, psi particle …   New Collegiate Dictionary

  • Particle swarm optimization — (PSO) is a swarm intelligence based algorithm to find a solution to an optimization problem in a search space, or model and predict social behavior in the presence of objectives.OverviewParticle swarm optimization is a stochastic, population… …   Wikipedia

  • J/ψ meson — J/ψ Composition cc Statistics Bosonic Interactions Strong, Weak, Electromagnetic force, Gravity Symbol …   Wikipedia

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