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Author Rimoldi, A. ♦ Mantovani, G. C. ♦ Cavalli-Sforza, M. ♦ Fraternali, M. ♦ Goggi, Giorgio V. ♦ Conta, C. ♦ Impellizzeri, F. ♦ Rossini, B. ♦ Pastore, F.
Source CERN Document Server
Content type Text
File Format PDF
Date Created 1990-01-28
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Modern physics ♦ Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword 10-100GeVcm ♦ ppi- ♦ Particle Physics - Experiment ♦ Delta++ Delta0 ♦ ppi+
Abstract The results of a systematic analysis of charge-exchange double dissociation in proton-proton collisions at the CERN Intersecting Storage Rings are presented. The data cover the entire ISR energy range between square root s=23 GeV and square root s=63 GeV at five standard energies. Double resonance production is observed in the Delta /sup ++/ Delta /sup 0/ and Delta /sup ++/N/sup 0/(1688) final states. The mass spectra of the p pi /sup -/ system show more pronounced resonant signals in the backward Jackson hemisphere. A detailed analysis ofdifferential cross sections shows a forward peak typical of absorbed pion exchanges decreasing as s/sup -1.81+or-0.06/, followed by a much gentler exponential behaviour associated with a trajectory typical of rho -A/sub 2/ exchange. The high-energy transition to this regime is also indicated by a dramatic change in the s-dependence of total cross sections as compared with low-energy data. (20 refs).
Description Presented at: Nucl. Phys. B 143 (1978) 365-394
Learning Resource Type Article
Publisher Date 1978-01-01
Page Count 46