Boson spectrum from 1.1 to 1.6 GeV and properties of A−2 meson observed by missing-mass spectrometer

Mass Spectrum of Bosons from 500 to 2500 MeV in the Reactionπ−+p→p+X−Observed by a Missing-Mass Spectrome

“…Oostens et al give an upper limit to the cr^ot of the order of 1 juib by comparison of 6 + production with 7r + production in p +p -d + 6 + , A 1 region.-We had no run in the mass region of the A 1 (1075) with the spectrometer operating with 100% efficiency. 4 In addition, this part of our experiment was not sensitive to momentum transfers \t I < 0.23, where A x was reported to be dominantly produced. 9 Also the mass region around M-1500 MeV was not investigated in the full-efficiency region in any of our runs.…”

“…A 2 (1286).-We have recently recomputed the value of do/dt for the A 2 production at 6 GeV/ c (Table I), which was underestimated earlier. 4 T(2195).-Recently an enhancement has been reported at 2207± 13 MeV in the n^ir 0 effective mass (Alles-Borelli et al, 10 />p annihilation at 5.7 GeV/c). The authors suggest that their peak may be identical with our T(2195).…”