Evidence For Goldhaber Effect In Pp Interactions At 300 Gev-C

Abstract We have observed evidence for the Goldhaber effect among pion pairs produced in six- and eight-prong events in pp interactions at 300 GeV/ c . We observe a pronounced difference between the opening angle distributions for pairs of pions of like and unlike electric charge. This effect decreases rapidly with increasing all-charged pion mass. Calculations indicate that resonance production can account for only about 30% of the observed effect. A search for the Goldhaber effect in high-charged-multiplicity events ( n c ⩾ 20) gives only inconclusive results.