One-pion-exchange analysis of the reaction np → ppπ- from 1.5 to 4.0 GeV/c incident momentum

G. Alexander*, O. Benary, S. Dagan, J. Grunhaus, A. Levy, I. Stumer, P. Ang, I. Bar-Nir, E. Burkhardt, H. Filthuth, H. Oberlack, A. Putzer, G. Horlitz, S. Wolff

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The reaction np → ppπ- has been studied in the incident-momentum range of 1 to 4 GeV/c using the DESY 85 cm HBC exposed to a neutron beam. The production of δ(1236) and other baryon states are examined. The reaction is analysed in terms of a one-pion-exchange model using the Dürr-Pilkuhn and Benecke-Dürr parametrisations. Taking Wolf's set of R parameters, apart from Rδ which was set to 1GeV-1, an adequate description of all features of the data is obtained. σ(np → ppπ-) as function of the neutron momentum is evaluated using the OPE model and the isospin relation between the δ production in np and pp reactions.

Original languageEnglish
Pages (from-to)221-238
Number of pages18
JournalNuclear Physics, Section B
Issue number1
StatePublished - 15 Jan 1973


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