We present production and decay distributions for the reaction vp-~ix m pir + with M^+ p < 1.4 GeV. This reaction is primarily vp-~ii~A ++ 9 but we find evidence for the presence of non-A amplitudes for Q 2 > 1 GeV 2 . The data are fitted by various theoretical models. For Q 2 < 1 GeV 2 the best fit yields the value M A =1.25t §;}| GeV, using a dipole-nucleon axial-vector form factor in Adler's model, although none of these models successfully reproduces the observed A-decay distributions.
We have measured the total inelastic cross section (o-jnel) a^d charged-particle multiplicities obtained mpp collisions at 405 GeV/c. The data are from a preliminary 12 000picture bubble-chamber exposure. We find cri^ei^ 32.8±1.0 mb; the low moments of the multiplicity distribution for negative particles are (??-)-3.50±0.07, D^ =2.37±0.05, f{ = 2.1±0.2, and/g" =0.1±0.9. We also present updated results at 102 GeV/c.
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