Measurement of the resonance parameters and radiative width of theρ+

Abstract
We present the results of new precision measurements of the radiative decay width, total width, and mass of the ρ+ meson. These parameters are, respectively, 59.8±4.0 keV, 0.150±0.005 GeV, and 0.771±0.004 GeV, and were extracted from data obtained on the coherent production of ρ+ in 200-GeV/c π+ interactions with nuclear targets.