Study of the reactions π+p → π+p π0π0 and π+p → π+p π0π0π0 at 3.5 GeV

We study the reactions π +p → π +p nπ 0 ( n = 2, 3) at 3.5 GeV/ c, with 940 and 143 events, respectively. Complete final states are recorded and measured in a heavy liquid bubble chamber. We find the cross sections: sigma;(π + p → π + p 2π 0) = 1300 ± 210 μ b, σ(π + p → π + p 3π 0) = 320 ± 70 μ b ,...

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Bibliographic Details
Published in:Nuclear physics. B 1977-06, Vol.124 (4), p.365-390
Main Authors: Mine, P., Irwin, G., Jacquet, F., Halsteinslid, A., Lillestol, E., Miklebost, K., Davis, P., Fournier, D., Grandpeix, J.Y., Grivaz, J.F., Veillet, J.J.
Format: Article
Language:English
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Summary:We study the reactions π +p → π +p nπ 0 ( n = 2, 3) at 3.5 GeV/ c, with 940 and 143 events, respectively. Complete final states are recorded and measured in a heavy liquid bubble chamber. We find the cross sections: sigma;(π + p → π + p 2π 0) = 1300 ± 210 μ b, σ(π + p → π + p 3π 0) = 320 ± 70 μ b , below the values predicted by statistical models from charged pion data. The mass spectra are given and channel separations are performed using Van Hove variables. Our results are in agreement with charged pion experiments. We present a description of the 3 π 0 system, with 61 events. Under certain hypotheses a spin-parity analysis favours 0 − at low mass and 1 − at high mass.
ISSN:0550-3213
1873-1562
DOI:10.1016/0550-3213(77)90411-4