Production of Multipion Systems with Large Longitudinal Momentum at the CERN Intersecting Storage Rings

Abstract
Inclusive cross sections are presented for 2π and 3π systems with large longitudinal x at the highest intersecting storage ring energies (s=53 GeV for 2π; s=53 and 62 GeV for 3π). The ratio π+πππ rises sharply with increasing x similar to the ratio K+K, as expected in a quark-model interpretation.