Elsevier

Nuclear Physics B

Volume 228, Issue 3, 5 December 1983, Pages 424-438
Nuclear Physics B

Proton-antiproton annihilations at rest into π0ω, π0η, π0γ, π0π0, and π0η′

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Abstract

Proton-antiproton annihilations at rest in liquid hydrogen were investigated through the inclusive γ spectrum, related to the annihilation. The high-energy part of the spectrum was used to deduce branching ratios for the so far unobserved annihilation channels: R(pp→π0ω) = (2.38 ± 0.65)%, R(pp→ π0η) = (0.82 ± 0.10%, Rpp→π0γ) = (0.015 ± 0.007)%, and R(pp → π0π0 = (0.06 ± 0.04)%. An upper limit for the π0η channel was deduced to be R(pp → π0η) < 1.1%.

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Cited by (0)

This work was supported by the Swiss National Science Foundation and by the Federal Ministry for Research and Technology of Germany.

1

On leave of absence from the Dept. of Physics, University of British Coluumbia, Vancouver, Canada.

2

Present address; BBC, Mannheim, Fed. Rep. Germany.

3

Now at ESO, Garching, Fed. Rep. Germany.

4

Now at CERN, Geneva, Switzerland

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