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"For their discovery of charmed particles. Particles carrying a fourth flavor quantum number (charm) were predicted by the electroweak theory in order to cancel flavor changing neutral currents. The discovery of heavy mesons with the anticipated characteristics furnished dramatic confirmation of the existence of charmed quarks, provided important support for the electroweak theory, and elucidated the nature of the narrow resonances J/psi and psi."
Miniaturized Biosensors for Healthcare