Dictionary Home »
Dictionary Definitions » J/psi particle
J/psi particle
(jāˈsīˈ, -psīˈ)
noun 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. See Table at subatomic particle.
Learn more about J/psi particle