Abstract
The total cross sections for π ++-p and π ±d scattering have been measured in the energy range 70–370 MeV in a classical transmission experiment using multiwire proportional chambers. The hydrogen data agree quite well with earlier measurements. After correcting our results for the direct effects of the Coulomb potential, we find energy-dependent differences of a few percent between the π +d and π −d cross sections. This charge symmetry violation can be parameterised in terms of mass and width differences between the Δ-isobars in agreement with the predictions of the quark model.
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