Large-angle $pi$$sup -$ proton elastic scattering at 14 and 23 GeV/c

The differential cross section for ${\ensuremath{\pi}}^{\ensuremath{-}}\ensuremath{-}p$ elastic scattering has been measured at 13.8 and 22.6 GeV/c up to $\ensuremath{-}t=5$ ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^{2}$. The dips in the angular distribution at $\ensuremath{-}t\ensuremath{\approx}0.8 \mathrm{and} 2.8$ ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^{2}$ previously observed at lower momenta become less prominent at higher momentum. The $\ensuremath{-}t=2.8$ ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^{2}$ dip is still observed at 13.8 GeV/c, but at 22.6 GeV/c it has become a sharp kink in the angular distribution. At large momentum transfers, $\frac{d\ensuremath{\sigma}}{\mathrm{dt}}$ at fixed $t$ is still decreasing with increasing $s$, but at a slower rate in the 14- to 23-GeV/c region than at lower momenta.