Backward Production In. Pi. Minus Plus Proton Goes to Neutron. Pi. Plus PI Minus at 8 GeV/c. [Differential Cross Sections]. PDF Download

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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].

Backward Production In. Pi. Minus Plus Proton Goes to Neutron. Pi. Plus PI Minus at 8 GeV/c. [Differential Cross Sections]. PDF Author:
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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).
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