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Backward production in. pi. minus plus proton goes to neutron. pi. plus PI minus at 8 GeV/c. [Differential cross sections]

Technical Report ·
DOI:https://doi.org/10.2172/7354594· OSTI ID:7354594
Events of the form ..pi../sup -/p ..-->.. n..pi../sup +/..pi../sup -/ where the neutron is produced fast and forward in the laboratory are reported. The data were obtained in an initial exposure of 160,000 pictures in the University of Illinois--Argonne National Laboratory streamer chamber using an 8 GeV/c pion beam. The chamber was triggered by the detection of a fast forward neutral hadron interacting in an array of thick plate optical spark chambers. The dominant feature of the data is quasi-two body-production of nrho/sup 0/ and nf/sup 0/ intermediate states. The differential cross section for rho/sup 0/ production shows evidence for backward peaking near u' = 0. The f/sup 0/ decay angular distributions appear to be consistent with the hypothesis of u channel proton exchange as the dominant production mechanism. For both nrho/sup 0/ and nf/sup 0/ production the observed cross sections are on the order of one microbarn. (auth)
Research Organization:
Illinois Univ., Urbana (USA)
OSTI ID:
7354594
Report Number(s):
COO-1195-353
Country of Publication:
United States
Language:
English

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Related Subjects

645104* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Meson-Induced Interactions-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
BARYON-EXCHANGE MODELS
BARYONS
BOSONS
CROSS SECTIONS
DECAY
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY RANGE
F-1260 RESONANCES
FERMIONS
GEV RANGE
GEV RANGE 01-10
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
KINETICS
LEPTONS
LINEAR MOMENTUM
MASSLESS PARTICLES
MATHEMATICAL MODELS
MESON RESONANCES
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
NEUTRINOS
NEUTRONS
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PERIPHERAL MODELS
PION-NUCLEON INTERACTIONS
PION-PROTON INTERACTIONS
REACTION KINETICS
RESONANCE PARTICLES
RHO-765 RESONANCES
TENSOR MESONS
VECTOR MESONS