Like- and Unlike-Charged Pion Correlations inπ+pandppInteractions at 100 GeV/c

Abstract

Charged-pion rapidity correlations are compared and found to have a similar peaked structure when studied inclusively. However, when the same data are studied semi-inclusively no correlation is found for like-charged pions and for unlike-charged pions in the central region. Inclusive correlations in these cases appear then from the convolution of the uncorrelated spectra at each multiplicity and the multiplicity distribution. Correlation in ${\pi }^{+}{\pi }^{-}$ is observed at small $\Delta y$ only for $y$ large.