R. Contri
University of Genoa
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European Physical Journal C | 1981
M. Barth; C. De Clercq; E. A. De Wolf; J. J. Dumont; D. Johnson; J. Lemonne; P. Peeters; R. Contri; H. Drevermann; L. Gerdyukov; Y. Goldschmidt-Clermont; G. Harigel; C. Milstene; J. P. Porte; R. T. Ross; P. Theocharopoulos; C. Caso; F. Fontanelli; R. Monge; S. Squarcia; U. Trevisan; J. F. Baland; J. Beaufays; J. Kesteman; F. Grard; P. A. van der Poel; L. Gatignon; Wolfram Kittel; Wesley J. Metzger; D. J. Schotanus
Inclusive charged pion production is studied in an exposure of BEBC, filled with hydrogen, to an incidentK+ beam of 70 GeV/c. Total cross sections for pion production and inclusive longitudinal and transverse momentum distributions of π−s and of positive particles are presented and compared with data at lower energies. Earlier evidence for scaling in the fragmentation regions is confirmed. The central region π− cross section increases proportionally topLAB−1/4; positive particles show almost no energy dependence atx=0. Particle ratios π+/π− are studied as a function ofx andy* and a comparison with 70 GeV/cK−p data is made. Analysis of structure functions for (ππ) pairs and of particle production associated with π± triggers at large |x| in the context of quark/parton models, provides qualitative evidence for the diquark-quark structure of the proton.
