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A 2.2-m streamer chamber in a large electromagnet was used with a 16-GeV bremsstrahlung beam to study multibody photoproduction. This paper reports on the 851 three-prong, three-constraint kinematic fit events of the type γp→π⁺π^-p; at energies above 6 GeV, these go almost completely to a pρ⁰ final state.
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Davier et al. (1968) studied this question.
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