Search for the production of fractionally charged particles in e(+)e(−) annihilations at s√=10.5 GeV

T. J. V. Bowcock,K. Kinoshita,Philip Daniel Mauskopf,F. M. Pipkin,M. Procario,Richard Wilson,J. Wolinski, D. Xiao,Philip Baringer,P. Haas,Ha Lam, A. Jawahery, C. H. Park,D. Perticone,R. Poling,R. Fulton,M. Hempstead,T. Jensen,D. R. Johnson,H. Kagan, R. D. Kass,F. Morrow, J. Whitmore,W. Y. Chen,J. Dominick,R. L. McIlwain,D. H. Miller,C. R. Ng,E. I. Shibata,W. M. Yao,E. H. Thorndike,M. S. Alam,N. Katayama, I. J. Kim,W. C. Li,Xinchou Lou,C. R. Sun,Daniela Bortoletto,M. Goldberg,N. Horwitz,P. Lubrano, M. D. Mestayer,G. C. Moneti,V. Sharma,Ian Shipsey,Tomasz Skwarnicki,S. E. Csorna,T. Letson,Ian Brock,Thomas Ferguson,Marina Artuso, C. Bebek,Karl Berkelman,J. Byrd,D. G. Cassel,Elliott Cheu,D. M. Coffman,Glen D. Crawford,J. W. Dewire,Persis S. Drell, R. Ehrlich,R. S. Galik, B. Gittelman,S. W. Gray,A. M. Halling,D. L. Hartill,B. K. Heltsley, J. Kandaswamy,R. Kowalewski,D. L. Kreinick,Y. Kubota,J. D. Lewis,N. B. Mistry,James Mueller,R. Namjoshi,S. Nandi,E. Nordberg,C. O'Grady, D. Peterson,M. Pisharody, D. Riley,M. Sapper,A. Silverman,Sheldon Stone, H. Worden, M. Worris,A. J. Sadoff,Paul Avery, D. Besson,L. Garren,John Yelton

Physical Review D（1989）

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Abstract

We report the results of a search for particles with electric charge /ital Q/=(2/3)/ital e/ produced in /ital e//sup +/e/sup /minus// annihilations at/ital W/=10.5 GeV. The ratio of the cross section for the inclusiveproduction of fractionally charged particles (/ital q/) to the dimuon pointcross section,/ital R//sub /ital q//=/sigma/(e/sup +/e/sup /minus///r arrow/qX)//sigma/(/ital e//sup +/minus///r arrow//mu//sup +//mu//sup /minus//), is found to have an upper limitat a 90%confidence level of 1.0/times/10/sup /minus/4/ for masses less than3.5 GeV//ital c//sup 2/.

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particles

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