Book Description

The results of a measurement of the $pi$$sup -$p $Yields$ $pi$$sup 0$n and $pi$$sup -$p $Yields$ eta n differential cross sections at six pion beam momenta from 20 to 200 GeV/c are presented. The data for these cross sections were collected at the Fermi National Accelerator Laboratory in Batavia, Illinois. A 73.5 x 73.5 cm lead--scintillator hodoscope was used to detect the two photons from the decay of the $pi$$sup 0$ and the eta; all other reactions were eliminated by detection of their charged particles and additional photons in an array of veto counters. The zero-degree charge exchange cross sections determined from these measurements are shown to be consistent with the measured $pi$$sup +$p and $pi$$sup -$p total cross section differences. Effective Regge trajectories for the rho and the A$sub 2$ also extracted from the data. 34 figures, 9 tables. (auth).