Charged particle spectra in π-p,π-d and π-C interactions at 38 GeV/c with single-particle high pT trigger

Angular momentum distributions of charged secondaries from 38 GeV/c π-p, π-d and π-C interactions triggered on at least one particle with pT >or approx. 1 GeV/c at an 90 deg πN c.m.s angle have been investigated with the spectrometer RISK (a streamer chamber placed into a magnet). Transversal momentum spectra of secondaries in the 0.4-2.4 GeV/c pT-range including triggering particles are quite well fitted with the exponential function for all nuclei studied and for particles of different charges. The azimuthal angle distribution of secondaries (an angle relative to the pT-tilde of the triggering particle) for both trigger-like and trigger-unlike charges is anisotropic, preferring the direction away from the triggering particle. The mean charge distribution of associated particles is discussed. A small fraction of triggering particles is due to neutral strange particle decays. Many Λ0-hyperons were detected among those neutral strange triggers