Search for neutrinoless tau decays: tau ---> e gamma and tau ---> mu gamma

K. W. Edwards,D. L. Hartill,G. Eigen,J. J. O’Neill,H. Marsiske,S. Köpp,C.R. Ng,T. E. Browder,J. Staeck,D. Ugolini,D. Besson,J. E. Fast,M. Lattery,L. P. Perera,H.A. Cho,B. K. Heltsley,I. Narsky,V. Jain,A. Undrus,H. Park,D. W. Bliss,R. Stroynowski,B. Nemati,S. W. Gray,T. Riehle,R. Mountain,K. Cho,J. Urheim,Bob I. Eisenstein,B. H. Behrens,T. Lee,J.S. Miller,J. P. Alexander,R. Kass,R. Godang,D. A. Roberts,N. Katayama,T. K. Nelson,G. Brandenburg,S. F. Schaffner,E. Johnson,D. M. Coffman,J. E. Duboscq,F. Li,G. H. A. Viehhauser,D. J. Lange,A. Wolf,B. E. Berger,P. Avery,J. Gronberg,D. Gibaut,M. Goldberg,C. Prescott,R. Ammar,Y.-J. Kwon,J. Lee,I. Korolkov,N. B. Mistry,D. G. Cassel,I. Karliner,J. Kandaswamy,I. P. J. Shipsey,J. D. Richman,I. Volobouev,K. Lingel,R.M. Hans,R. Poling,E. Gerndt,S. Yang,T. Hart,E. H. Thorndike,S. C. Timm,S. Schuh,M. Dickson,F. Frasconi,P.C. Kim,G. Bonvicini,E. I. Shibata,S. D. Johnson,C. P. Ward,A. Anastassov,A. Efimov,K. Bloom, Xiao-Fan Zhou,J. Bartelt,S. Anderson,J. Roy,W. T. Ford,P. Rankin,A. J. Sadoff,M. Sung,J. G. Smith,N. Menon,S. E. Csorna, V.I. Fadeev,S. Márka,P. Skubic,М. Перл,G. C. Moneti,Y. Li,R. Ehrlich,S. J. Richichi,S. Schrenk,S. Stone,T. Skwarnicki,C.P. O'Grady,Y. Maravin,P. Gaidarev,C. Bebek,A.J.R. Weinstein,D. Coppage,A. Rýd,R. Davis,T. E. Coan,R. Fulton,R. Kutschke,K.W. McLean,I. C. Lai,R. J. Wilson,M. Lohner,J. Masui,R. Wanke,R. Greene,H. Kagan,Frank Wuerthwein,A. Bellerive,D. Peterson,J.W. Hinson,J. R. Patterson,G. Gladding,Y. Mukhin,M. S. Witherell, Max Wood,D. Fujino,S. Patton,M. M. Zoeller,W. S. Brower,H. Yamamoto,I. Kravchenko,J. P. Zheng,R. Balest,A. Freyberger,R. A. Briere,C. Qiao,K. Kinoshita,J. Ernst,S. Kotov,Min Gao,H. Severini,P.I. Hopman,N. Kwak,X. Xing,F. R. Wappler,D. B. MacFarlane,T. Bergfeld,D. Riley,D.M. Asner,C. Jessop,M. Bishai,M. Chadha,S. L. Jones,S. Chan,P. Baringer,C. Darling,M. Ogg,R. Elia,A. Bean,H. Tajima,David S. Crowcroft,Z. Ling,C.D. Jones,N. Hancock,Mahtab Alam,P. M. Patel,M. Athanas,A. M. Smith,H. N. Nelson,B. Barish,J.L. Rodriguez,J. Ye,M. Yurko,L. Gibbons,M. Selen,S. Roberts,R. Janicek,S. Blinov,G. D. Gollin,H. P. Paar,P. S. Drell,R. J. Morrison,A.H. Mahmood,M.B. Spencer,S. B. Athar,K. Honscheid,P. Pomianowski,S. Menary,G. S. Ludwig,V. Savinov,J. Mevissen,J. J. Thaler,Karl Matthew Ecklund,Y. Liu,D. Cinabro,B. Gittelman,Yoshihiro Kubota,Y. Gao,M. Artuso,M. Śchmidtler,A. Soffer,E. Nordberg,K. K. Gan,D. H. Miller,R.S. Galik,W. R. Ross,D. He,M. Palmer,G. Masek,S. Nakanishi,V.G. Shelkov,K. Berkelman,D.Y.J. Kim,R. Wang,J. Yelton,A. Foland,D. L. Kreinick

Physical Review D（1996）

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Abstract

A search for the lepton family number violating decays {tau} {yields} e{gamma} and {tau} {yields} {mu}{gamma} has been performed using CLEO-II data. No evidence of a signal has been found and the corresponding upper limits are B({tau} {yields} e{gamma}) < 2.7 x 10{sup -6} and B({tau} {yields} {mu}{gamma}) < 3.0 c 10{sup -6} at 90% CL.

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Key words

neutrinoless tau decays,mu gamma

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