Experimental limit on the decay W±→π±γ at the cern proton-antiproton collider

C. Albajar, M. G. Albrow, O. C. Allkofer, B. Andrieu, K. Ankoviak, R. Apsimon, B. Aubert, C. Bacci, S. Bartha, G. Bauer, A. Bettini, A. Bezaguet, P. Biddulph, H. Bohn, A. Böhrer, R. Bonino, K. Bos, M. Botlo, D. Brockhausen, C. BuchananB. Buschbeck, G. Busetto, A. Caner, P. Casoli, H. Castilla-Valdez, F. Cavanna, P. Cennini, S. Centro, F. Ceradini, G. Ciapetti, S. Cittolin, E. Clayton, D. Cline, J. Colas, R. Conte, J. A. Coughlan, G. Cox, D. Dau, C. Daum, M. Della Negra, M. Demoulin, D. Denegri, H. Dibon, A. Diciaccio, F. J. Diez Hedo, L. Dobrzynski, J. Dorenbosch, J. D. Dowell, D. Drijard, K. Eggert

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We present a search for the decay W±→π±γ, using data taken at the CERN proton-antiproton Collider with the UA1 detector and corresponding to an integrated luminosity of 0.7 pb-1. We do not observe a signal for such a process: hence we obtain an upper limit on the π±γ decay width of 5.8×10-2Γ (W±→e±v) (95%CL).

Original languageEnglish (US)
Pages (from-to)283-288
Number of pages6
JournalPhysics Letters B
Issue number2
StatePublished - May 10 1990

Bibliographical note

Funding Information:
The following funding agencies have contributed to this programme: Fonds zur Frrderung der Wissenschaftlichen For-schung, Austria. Valtion luonnontieteellinen toimikunta, Suomen Akatemia, Finland. Institut National de Physique Nuclraire et de Physique des Particules and Institut de Recherche Fon-damentale (CEA), France. Bundesministerium f'fir Forschung und Technologic, FRG. Istituto Nazionale di Fisica Nucleare, Italy. Science and Engineering Research Council, UK. Stichting Voor Fundamenteel Onderzoek der Ma-terie, The Netherlands. Department of Energy, USA. The Natural Sciences and Engineering Research Council of Canada. Thanks are also due to the following people who have worked with the collaboration in the preparations for and data collection on the runs described here: L. Baumard, F. Bernasconi, D. Brozzi, V. Cecconi, L. Dumps, G. Fetchenhauer, G. Gallay, S. Lazic, J.C. Michelon, S. Pavlon and L. Pollet.


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