Measurement of the Reactionπ−p→π0nat Large Momentum Transfers

Abstract

We present results of an experiment to measure the differential cross section of the reaction ${\pi }^{-}p\to {\pi }^{0}n$ between the forward and backward peaks. The measurements were made at incident ${\pi }^{-}$ momenta of 3.67 and 4.83 $\frac{\mathrm{GeV}}{c}$. The $t$ range $1.7<~\mathrm{}\left|t\right|\mathrm{}<~4.9 {\left(\frac{\mathrm{GeV}}{c}\right)}^2$ was covered at the lower momentum and $1.8<~\mathrm{}\left|t\right|\mathrm{}<~7 {\left(\frac{\mathrm{GeV}}{c}\right)}^2$ at the higher momentum. At the lower momentum the cross section is essentially constant between $\mathrm{}\left|t\right|=2.4\mathrm{}$ and 4.8 ${\left(\frac{\mathrm{GeV}}{c}\right)}^2$ while at the higher momentum the angular distribution exhibits a broad minimum centered at $\mathrm{}\left|t\right|=4.4\mathrm{} {\left(\frac{\mathrm{GeV}}{c}\right)}^2$.