Decay Modes
The hadronic decay modes of the J/ψ are strongly suppressed because of the OZI Rule. This effect strongly increases the lifetime of the particle and thereby gives it its very narrow decay width of just 93.2±2.1 keV. Because of this strong suppression electromagnetic decays begin to compete with hadronic decays. This is why the J/ψ has a significant branching fraction to leptons.
Read more about this topic: J/psi Meson
Famous quotes containing the words decay and/or modes:
“It has taken me nearly twenty years of studied self-restraint, aided by the natural decay of my faculties, to make myself dull enough to be accepted as a serious person by the British public; and I am not sure that I am not still regarded as a suspicious character in some quarters.”
—George Bernard Shaw (1856–1950)
“In the final analysis, “style” is art. And art is nothing more or less than various modes of stylized, dehumanized representation.”
—Susan Sontag (b. 1933)