Nuclear interactions of 340-GeV pions in emulsion

Some results on heavy- and shower-particle multiplicities produced in interactions of 340-GeV pions in nuclear emulsion are presented and compared with similar results in proton-nucleus interactions at different energies. Values of left-angle Ng right-angle in π-A interactions are found to be less than its value in pA interactions at similar energies. This is understood in terms of additive quark model. The result on mean normalized multiplicity reveals that the values of RA1 are almost constant in the forward direction for all values of left-angle ν(Ng)right-angle and RA1 increases with left-angle ν(Ng)right-angle in the intervals 1.2<η≤2.0 and η≤1.2