Abstract
The production and decay of the A 2 meson has been studied in a 3.3 events/μb, 7 GeV/ cπ −p bubble chamber experiment. The cross section for π −p→A 2 −p was found to be 120±25 μb. The reaction π −p→A 2 − π 0p was also observed. The alignment of the A 2 − is consistent with the hypothesis that the production is due mainly to ϱ-exchange. The ϱπ decay distributions favour a 2 + spin parity assignment for both the lower and upper parts of the A 2. The ηπ decay distributions for the whole A 2 region are also consistent with J P =2 +.
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