Measurement of the ratio R≡σWBr(W→μν)/σzBr (Z→μμ) and ΓWtot at the CERN proton-antiproton collider

C. Albajar, M. G. Albrow, O. C. Allkofer, 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. Buchanan, B. BuschbeckG. 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, D. Dau, D. 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, E. Eisenhandler, N. Ellis

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An analysis of W and Z boson production at UA1, using 4.66 pb-1 of data from the 1988 and 1989 CERN pp Collider runs at s=0.63 TeV, yields R≡σWBr(W→μv)/σzBr (Z→μμ)=10.4-1.5+1.8stat.± 0.8(syst.) We find R=9.5-1.0+1.1(stat.+syst.) when combining all available UA1 data, in both the electron and muon channel, taken in the period 1983-1989. In the framework of the standard model, the value of R is used to infer the total width of the W boson, ΓWtot=2.18-0.24+0.26 (exp.)±0.04(theory) GeV/c2.

Original languageEnglish (US)
Pages (from-to)503-510
Number of pages8
JournalPhysics Letters B
Issue number3-4
StatePublished - Jan 10 1991


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