Pion production inppcollisions at102 GeVc

We present preliminary results on single-pion production and two-pion correlations making use of a 30 000-picture exposure of the ANL/NAL 30-in. hydrogen bubble chamber to $102-\frac{\mathrm{GeV}}{c}$ protons. The data, when compared with those from lower energies, indicate approximate scaling of $\pi$ production in the proton-fragmentation region, but show a continuing rise of the cross section at $y_{\mathrm{c}.\mathrm{m}.\mathrm{}}=0\mathrm{}$. Stronger correlations are observed between pions of opposite charge than between pions of like charge. The variation with energy of the charge transferred between c.m. hemispheres is slow, as would be predicted by multiperipheral-type models.