Study of Diquark Fragmentation at the CERN Intersecting Storage Rings

Abstract

Forward particle production in $\mathrm{pp}$ interactions triggered by a 30\ifmmode^\circ\else\textdegree\fi{} pion of momentum exceeding 5 GeV/c has been studied at c.m. energy of 63 GeV. Quantum-chromodynamic model calculations show that in a majority of such interactions the incident proton loses a valence quark. Results indicate that hadronization of diquarks is primarily a recombination process leading to the formation of a high-$x$ baryon.