Measurements of correlations of nearly back-to-back hadrons produced at a large transverse momentum in $\sqrt{s}=38.8\mathrm{}$ GeV proton-proton collisions are presented and compared to previous results with a beryllium target. The correlations of identified unlike-sign hadron pairs in ratio to the correlation for all unlike-sign pairs are compared with predictions of the Lund model. These predictions differ from the data.

• Received 17 March 1988

DOI:https://doi.org/10.1103/PhysRevD.38.1016