Abstract
A semiclassical model for the observation of recoil protons in quasielastic pion scattering near the (3, 3) resonance is described. We show that the ${\ensuremath{\pi}}^{\ensuremath{-}}$ to ${\ensuremath{\pi}}^{+}$ ratio is enhanced by large factors at low proton energies by charge exchange of the recoil nucleon.NUCLEAR REACTIONS Calculated recoil proton spectra, quasielastic pion scattering, (3, 3) resonance region. Dependence of $\frac{\ensuremath{\sigma}({\ensuremath{\pi}}^{\ensuremath{-}},p)}{\ensuremath{\sigma}({\ensuremath{\pi}}^{+},p)}$ on recoil nucleon charge exchange.
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