Evidence for decays of the D- and e-mesons into σπ in [formula omitted]p annihilation at 700 MeV/ c

• Published in: Nuclear physics. B 1972-07, Vol.44 (1), p.125-141
• Main Authors: Defoix, C., Do Nascimento, A., O'Neall, J.S., Siaud, J., Bizzarri, R., Dobrzynski, L., Ganguli, S.N., Montanet, L., Reucroft, S., Yamagata, T.
• Format: Article
• Language: English
• ISSN: 0550-3213; 1873-1562
• DOI: 10.1016/0550-3213(72)90274-X

A study is made of η 0 production in p p → 3π +3π −π 0 (7500 events) at an incident momentum of 720 MeV/ c. The reaction is dominated by production of ω 0 (≈68 o/o). The η o production has been studied by means of two independent methods: the first, a study of correlations between the (4 π) ± and (5 π) 0 and the (3 π) 0 systems, circumvents the problem of ω 0 reflections. The second attempts to isolate the η 0 4π channel by means of rigorous selections using the decay properties of η 0 and ω 0. The results of the two methods are consistent and confirnm the production of σ +-, D 0 and E 0 with the decays ifD 0 → σ ± π ± → η 0 π + π( su−), E 0 → σ ± π ∓ → η( su0) π + π −, E 0 → η 0 π + π −.