Measurement of the Resonance Parameters and Radiative Width of the $\rho^+$

We present the results of new precision measurements of the radiative decay width, total width, and mass of the ${\ensuremath{\rho}}^{+}$ meson. These parameters are, respectively, 59.8\ifmmode\pm\else\textpm\fi{}4.0 keV, 0.150\ifmmode\pm\else\textpm\fi{}0.005 GeV, and 0.771\ifmmode\pm\else\textpm\fi{}0.004 GeV, and were extracted from data obtained on the coherent production of ${\ensuremath{\rho}}^{+}$ in 200-GeV/c ${\ensuremath{\pi}}^{+}$ interactions with nuclear targets.