Hadron Production at Large Transverse Momentum

Abstract
We have studied production of π0 with transverse momentum between 2.0 and 4.4 GeV/c at 65 and 93° in the c.m. system in 300-GeV proton-nucleon collisions, by inserting foils of various thicknesses into a secondary beam and measuring the electron and positron spectra produced by γ conversion. The π0 invariant cross sections are given at 93 and 65°. We also report invariant cross sections for negatively charged hadrons as a function of transverse momentum.