Total Cross Sections of 60-Mev Mesons in Hydrogen and Deuterium

Abstract

The total cross sections of positive and negative mesons of average energy 58 Mev have been measured in hydrogen and deuterium. The results are $\left\{\sigma \right({\pi }^{+}+p),=27.8\mathrm{}\pm 2.5 \mathrm{mb}\}\left\{\sigma \right({\pi }^{-}+p),=17.6\mathrm{}\pm 2.2 \mathrm{mb}\}\left\{\sigma \right({\pi }^{+}+d),=38.3\mathrm{}\pm 3.1 \mathrm{mb}\}\left\{\sigma \right({\pi }^{-}+d),=32.8\mathrm{}\pm 3.1 \mathrm{mb}.\mathrm{}\}$ The deuteron cross sections are related to the elementary scattering amplitudes in the impulse approximation, and the observed interference is compared to that predicted in weak coupling meson theory.