rho meson

rho meson

[′rō ′mā‚sän]

(particle physics)

Collective name for vector meson resonances belonging to a charge multiplet with total isospin 1, hypercharge 0, negative charge conjugation parity, positive g-parity, mass of about 770 MeV, and width of about 146 MeV. Designated ρ(770).