Paolo Bagnaia,M. Banner,Roberto Battiston,Ph. Bloch,F. Bonaudi,K. Borer,M. Borghini,J. C. Chollet,Allan G Clark,C. Conta,P. Darriulat,L. Di Lella,J. Dines-Hansen,P. A. Dorsaz,Louis Fayard,Marco Fraternali,Daniel Froidevaux,G. Fumagalli,J. M. Gaillard,O. Gildemeister,V. G. Goggi,H. Grote,B. Hahn,H. Hänni,John H. L. Hansen,P. H. Hansen,T. Himel,V. Hungerbühler,Peter Jenni,O. Kofoed-Hansen,Eric Lancon,Michele Livan,S. Loucatos,B. Madsen,P. Mani,Bruno Mansoulie,Giancarlo Mantovani,Livio Mapelli,B. Merkel,M. Mermikides,R. Mollerud,B.S. Nilsson,C. Onions,G. Parrour,F. Pastore,H. Plothow-Besch,M. Polverel,J. P. Repellin,Adele Rimoldi,A. F. Rothenberg,A. Roussarie,G. Sauvage,J. Schacher,J. L. Siegrist,H.M. Steiner,G. Stimpfl,F. Stocker,J. Teiger,Valerio Vercesi,A. R. Weidberg,H. Zaccone,J. A. Zakrzewski,W. Zeller
Physics Letters B（1983）
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摘要
Abstract From a search for electron pairs produced in p p collisions at s = 550 GeV we report the observation of eight events which we interpret as resulting from the process p +p→Z 0 + anything, followed by the decay Z0→e++e− or Z0→e++e−+γ, where Z0 is the neutral Intermediate Vector Boson postulated by the unified electroweak theory. We use four of these events to measure the Z0 mass M Z = 91.9 ± 1.3 ± 1.4 (systematic) GeV /c 2 .
