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Diffraction dissociation at the CERN pulsed pp collider at c.m. Energies of 900 and 200 GeV

par Ansorge, Richard R.E.;Wilquet, Gaston ; [et al.]
Référence Zeitschrift für Physik. C, Particles and fields, 33, 2, page (175-185)
Publication Publié, 1986-06

Article révisé par les pairs

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Résumé :

Cross-sections for diffractive particle production and pseudorapidity distributions of the decay products of diffractive states are presented. The data were obtained with the UA 5 streamer chamber detector at the CERN pp Collider operated in a new pulsed mode yielding pp interactions at c.m. energies of 900 and 200 GeV. Data recorded with a special trigger designed to select a sample of events enriched in single-diffractive interactions clearly favour a pt-limited fragmentation of diffractive states. The cross-section for single-diffractive particle production ϊ was found to be 7.8±0.5±1.1 mb at 900 GeV and 4.8±0.5±0.8 mb at 200 GeV (first error statistical, second systematic). From the pseudorapidity distribution of diffractive states we deduce the average number of charged particles to be 6.5±1.0 at 900 GeV and 4.1±1.1 at 200 GeV. Furthermore we report on our estimates for the cross-section of double-diffractive particle production at both Collider energies. © 1986 Springer-Verlag.