Phys. Rev. D 61, 032002 (2000) [9 pages]New analysis of the radiative decay ω⃗ηγ in proton-antiproton annihilation at restReceived 4 June 1999; published 4 January 2000 We report on a measurement of the branching ratio of the rare decay ω⃗ηγ relative to the well known decay ω⃗π0γ. The ω’s are produced in pp̅ →ηω and pp̅ →π0ω. Eigenstate mixing and interference effects of the ω and ρ0 are taken into account, as well as coherent interference with the background. We find evidence for the non-resonant annihilation channel B(pp̅ →ηηγ)=(3.5±1.3)×10-5 and limit the value of B(ω⃗ηγ) to the range of (0.7to5.5)×10-4 depending on the degree of coherence with the background. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.61.032002
DOI:
10.1103/PhysRevD.61.032002
PACS:
13.20.Jf
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