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

Omega Photon Collaboration, R. J. Apsimon,M. Atkinson,M. Baake,L. S. Bagdasarian, D. Barberis,T. J. Brodbeck,N. Brook,T. Charity,A. B. Clegg,P. Coyle,S. Danaher,S. Danagulian,M. Davenport,B. Dickinson,B. Diekmann, A. Donnachie, A. T. Doyle,J. Eades,R. J. Ellison, P. S. Flower,J. M. Foster,W. Galbraith, P. I. Galumian, C. Gapp, F. Gebert, G. Hallewell, K. Heinloth, R. C. W. Henderson, M. T. Hickman,C. Hoeger, A. Holzkamp, S. Holzkamp,R. E. Hughes-Jones, M. Ibbotson, H. P. Jakob,D. Joseph, N. R. Keemer, J. Kingler, G. Koersgen,S. D. Kolya, G. D. Lafferty,H. McCann,R. McClatchey,C. McManus,D. Mercer, J. A. G. Morris,J. V. Morris,D. Newton,A. O'Connor, R. Oedingen, A. G. Oganesian, P. J. Ottewell,C. N. Paterson,E. Paul,D. Reid, H. Rotscheidt,P. H. Sharp,S. Soeldner-Rembold,N. A. Thacker, L. Thompson,R. J. Thompson, J. Waterhouse, A. S. Weigend,G. W. Wilson

Zeitschrift für Physik C Particles and Fields（1991）

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摘要

Measurements are reported of inclusive production of π0-mesons in the beam fragmentation region in γp, πp andKp collisions. Results include the ratio of π0 production inKp and πp collisions, showing reduced production from fragmentation of theK-meson, and the ratio of π0 production in photon and hadron collisions which shows agreement with modified Vector Meson Dominance at lowP T , and departures at higherP T signalling the onset of direct photon reactions. The pattern of departure from Feynman scaling at highP T points to a contribution of hard parton-parton collisions in both γp and πp collisions.

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关键词

Field Theory, Elementary Particle, Quantum Field Theory, Particle Acceleration, Vector Meson

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