500-MeV pion single-charge exchange on deuterium

Abstract

Measurements of spectra from the $^{2}\mathrm{H}$(${\mathrm{\ensuremath{\pi}}}^{\mathrm{\ensuremath{-}}}$,${\mathrm{\ensuremath{\pi}}}^{0}$) reaction with a 500 MeV beam have been made from near zero degrees to 90 degrees. A peak corresponding to breakup or quasielastic scattering is observed, and its width, maximum, and differential cross section are reported. Peak shape determinations were also made with the $^{2}\mathrm{H}$(${\mathrm{\ensuremath{\pi}}}^{+}$,${\mathrm{\ensuremath{\pi}}}^{0}$) reaction. Results are compared to recent pion charge exchange data on deuterium at lower pion beam energies. A simple impulse approximation calculation accounts for the data at all angles.