ψψ production and limits on beauty meson production from 400 GeV/c protons

From a study of multimuon events obtained in a high luminosity proton-platinum experiment at 400 GeV/ c, we find 5 ± 4 ψψ events, which correspond to a production cross section σ( ψψ = 27 ± 10 pb. The observed production is compared to the ψψ events previously found in the same apparatus from incomi...

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Published in:Physics letters. B 1985-08, Vol.158 (1), p.85-91
Main Authors: Badier, J., Boucrot, J., Bourotte, J., Burgun, G., Callot, O., Charpentier, Ph, Crozon, M., Decamp, D., Delpierre, P., Gandois, B., Hagelberg, R., Hansroul, M., Karyotakis, Y., Le Dû, P., Lefrançois, J., Leray, Th, Michelini, A., Miné, Ph, Rahal, G., Runolfsson, O., Siegrist, P., Tilquin, A., Vanderhaghen, R., Weisz, S.
Format: Article
Language:English
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Summary:From a study of multimuon events obtained in a high luminosity proton-platinum experiment at 400 GeV/ c, we find 5 ± 4 ψψ events, which correspond to a production cross section σ( ψψ = 27 ± 10 pb. The observed production is compared to the ψψ events previously found in the same apparatus from incoming π −; a comparison with QCD predictions is performed, giving a good agreement with expectations from gluon-gluon fusion. Finally, using like-sign dimuon, trimuon and quadrimuon events, we give model-dependent upper limits on beauty meson production: 2 nb/nucleon for central models, 20 nb/nucleon for diffractive production.
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(85)90745-2