Elsevier

Nuclear Physics B

Volume 11, Issue 3, 1 July 1969, Pages 551-572
Nuclear Physics B

The four-prong annihilation of 1.2 GeV/c antiprotons in hydrogen (II) π+π+πππ0 final state

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Abstract

Approximately 17 000 four-prong annihilations of 1.2 GeV/c antiprotons in hydrogen have been analyzed. The present report considers those events with one neutral pion (5π).

The 5π events show production of ϱ0, ϱ±, f0, ω0, η0 mesons, and the possibility of a ϱϱ enhancement at 1400 MeV/c and/or a ϱπ enhancement at 1080 MeV/c is considered. The influence of the Bose-Einstein correlation function of Goldhaber et al. [6] is investigated. Centre-of-mass angular distributions of the pions and centre-of-mass opening angles between pairs of pions are presented. The production upper limits at the 95% confidence level, for several resonant states are given.

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