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Backward resonance production of pi minus plus proton goes to neutron pi plus pi minus at 8 GeV/c. [Production mechanisms]

Technical Report ·
DOI:https://doi.org/10.2172/6507024· OSTI ID:6507024
A study of the interaction ..pi../sup -/p ..-->.. n..pi../sup +/..pi../sup -/ is reported where the neutron was produced fast and forward in the laboratory. The data were obtained using an 8 GeV/c ..pi../sup -/ beam that was focused on a liquid hydrogen target located inside the University of Illinois--Argonne National laboratory streamer chamber. The chamber was triggered on the interaction of a fast, forward neutral hadron in thick plate optical spark chambers. A total of 866 events had an acceptable 3-constraint fit to ..pi../sup -/p ..-->.. n..pi../sup +/..pi../sup -/ and satisfied other selection criteria. The data were characterized by backward production of the final states n rho/sup 0/, nf/sup 0/, and ..delta../sup -/(1232)..pi../sup +/. Differential cross sections and decay angular distributions for these resonant states are presented and the implications for the production mechanisms discussed. 20 references.
Research Organization:
Illinois Univ., Urbana (USA). Graduate Coll.
DOE Contract Number:
EY-76-C-02-1195
OSTI ID:
6507024
Report Number(s):
COO-1195-415
Country of Publication:
United States
Language:
English