Observation of diffraction excitation in pp → (pπ+π−)+X at the CERN-ISR and tests of limiting fragmentation
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In a single-arm magnetic spectrometer experiment at the CERN Intersecting Storage Rings (ISR), a prominent diffractive enhancement is observed for inclusive production of (pπ+π-) systems near x ∼ 1 at √s = 53 and 35 GeV. In testing limiting fragmentation and scaling for this system, inclusive pπ+π- diffractive excitation into a fixed invariant mass range is found to possess a cross-section independent of s to within (3 ± 5)%. The main component in the (pπ+π-) system is Δ(1236)π, with a charge structure compatible with the break-up of an isotopic spin 1 2 system. © 1975.
author list (cited authors)
Baksay, L., Boehm, A., Foeth, H., Staude, A., Lockman, W., Medinnis, M., ... Strolin, P.