Study of the Reactionπ−p→π+Δ(1236)−in the Backward Direction at 2.15 to 6 GeV/c

Abstract

We present data on the differential cross section for the reaction ${\pi }^{-}p\to {\pi }^{+}\Delta {\mathrm{}\left(1236\right)\mathrm{}}^{-}$ for ${\pi }^{+}$ scattered backward near 180°, $-0.002>u-u_{max}\gtrsim -0.09\mathrm{}$ ${(\mathrm{G}\mathrm{e}\mathrm{v}/\mathit{c})}^2$, with incident ${\pi }^{-}$ beam momenta between 2.15 and 6 GeV/c. The differential cross section exhibits a sharp backward dip which appears to persist over this range of incident momenta.