Limits on spin 0 bosons in e+e- annihilation up to 45.2 GeV CM energy

H. J. Behrend*, J. Bürger, L. Criegee, H. Fenner, G. Franke, J. Meyer, V. Schröder, H. Sindt, U. Timm, G. G. Winter, W. Zimmermann, P. J. Bussey, A. J. Campbell, J. B. Dainton, D. Hendry, J. M. Scarr, I. O. Skillicorn, K. M. Smith, M. Poppe, H. SpitzerO. Achterberg, G. D'Agostini, W. D. Apel, J. Engler, G. Flügge, B. Forstrauer, D. C. Fries, W. Fues, K. Gamerdinger, Th Henkes, G. Hopp, J. Knapp, M. Krüger, H. Küster, H. Müller, H. Randoll, K. H. Ranitzsch, G. Schmidt, H. Schneider, W. de Boer, G. Buschhorn, G. Grindhammer, P. Grosse-Wiesmann, B. Gunderson, C. Kiesling, R. Kotthaus, H. Lierl, D. Lüers, H. Oberlack, P. Schacht, G. Bonneaud, P. Colas, A. Cordier, M. Davier, D. Fournier, J. F. Grivaz, J. Haissinski, V. Journé, F. LeDiberder, U. Mallik, E. Ros, J. J. Veillet, J. H. Field, R. George, M. Goldberg, O. Hamon, F. Kapusta, F. Kovacs, R. Pain, L. Poggioli, M. Rivoal, M. Gaspero, B. Stella, R. Aleksan, J. Bouchez, G. Carnesecchi, G. Cozzika, Y. Ducros, A. Gaidot, P. Jarry, Y. Lavagne, F. Ould Saada, J. Pamela, J. P. Pansart, F. Pierre, G. Alexander, G. Bella, Y. Gnat, J. Grunhaus

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We have studied the reactions e+e- → e+e-, e+e- → γγ, e+e- → μ+μ-, and e+e- → τ+τ- in the centre-of-mass (CM) energy range from 39.8 to 45.2 GeV using the CELLO detector at PETRA. Upper limits on the partial widths for new spin 0 bosons with masses both within and above the energy range covered are determined. No evidence for contributions of such new particles has been observed up to the highest PETRA energies in a model independent way. Under the assumptions of recently suggested models relating the existence of spin 0 bosons to the radiative width Γτ of the Z0 we exclude such bosons at the 95% confidence level for masses below the Z0-mass if Γτ > 20 MeV.

Original languageEnglish
Pages (from-to)130-136
Number of pages7
JournalPhysics Letters B
Issue number1-2
StatePublished - 31 May 1984


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