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- subatomic particle: an unstable elementary particle of the meson group. It has a large mass, about 6,000 times that of an electron, and is thought to be formed from charmed quarks.

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The dominant theory of the internal structure of hadrons involves quarks, which are subparticles of fractional charge; a proton, for example, is made...

That atoms are not solid bits of matter, incapable of further subdivision, became clear from several major discoveries made near the end of the 19th...

The reluctance to accept atomism was partly to do with its past history, when it had been associated with materialism, and thus with atheism....

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Particle Accelerator (CERN/Science Source/Photo Researchers, Inc.)

Particle Accelerator

J. M. Coetzee (Michael Dalder/Corbis)

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Alpha Particles ( Microsoft Corporation. All Rights Reserved.)

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	Windows Live® Search Results J/ψ meson - Wikipedia, the free encyclopedia The J/ψ is a subatomic particle, a flavor-neutral meson consisting of a charm quark and a charm anti-quark. Mesons formed by a bound state of a charm quark and a charm anti-quark ... J/Psi particle, 23/11/04, 3rd Year Group Project : CP Violation This page is for the attention of Max Beaumont, Neil Faraday, Olly Ford, Laurence King and Prof. Paul Harrison J/psi particle definition of J/psi particle in the Free Online ... J/psi particle. An elementary particle with an unusually long lifetime or, from the Heisenberg uncertainty principle, with an extremely narrow width &Ggr; = 91.0 ± 3.2 keV, and a ... See all search results in Windows Live® Search Results

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