Inclusive production of π0-mesons in πp,Kp and γp collisions at energies around 100 GeV (original) (raw)

Measurements are reported of inclusive production of re ~ in the beam fragmentation region in yp, rep and Kp collisions. Results include the ratio of re o production in Kp and rep collisions, showing reduced production from fragmentation of the K-meson, and the ratio of re~ production in photon and hadron collisions which shows agreement with modified Vector Meson Dominance at low Pr, and departures at higher Pr signalling the onset of direct photon reactions. The pattern of departure from Feynman scaling at high PT points to a contribution of hard parton-parton collisions in both yp and np collisions.