Phys. Rev. D
55,
R3919–R3923
(1997)
Search for neutrinoless τ decays: τ→eγ and τ→μγ
K. W. Edwards et al. (CLEO Collaboration)
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K. W. Edwards1, A. Bellerive2, R. Janicek2, D. B. MacFarlane2, K. W. McLean2, P. M. Patel2, A. J. Sadoff3, R. Ammar4, P. Baringer4, A. Bean4, D. Besson4, D. Coppage4, C. Darling4, R. Davis4, N. Hancock4, S. Kotov4, I. Kravchenko4, N. Kwak4, S. Anderson5, Y. Kubota5, M. Lattery5, J. J. O’Neill5, S. Patton5, R. Poling5, T. Riehle5, V. Savinov5, A. Smith5, M. S. Alam6, S. B. Athar6, Z. Ling6, A. H. Mahmood6, H. Severini6, S. Timm6, F. Wappler6, A. Anastassov7, S. Blinov7, J. E. Duboscq7, D. Fujino7, R. Fulton7, K. K. Gan7, T. Hart7, K. Honscheid7, H. Kagan7, R. Kass7, J. Lee7, M. B. Spencer7, M. Sung7, A. Undrus7, R. Wanke7, A. Wolf7, M. M. Zoeller7, B. Nemati8, S. J. Richichi8, W. R. Ross8, P. Skubic8, M. Wood8, M. Bishai9, J. Fast9, E. Gerndt9, J. W. Hinson9, N. Menon9, D. H. Miller9, E. I. Shibata9, I. P. J. Shipsey9, M. Yurko9, L. Gibbons10, S. D. Johnson10, Y. Kwon10, S. Roberts10, E. H. Thorndike10, C. P. Jessop11, K. Lingel11, H. Marsiske11, M. L. Perl11, S. F. Schaffner11, D. Ugolini11, R. Wang11, X. Zhou11, T. E. Coan12, V. Fadeyev12, I. Korolkov12, Y. Maravin12, I. Narsky12, V. Shelkov12, J. Staeck12, R. Stroynowski12, I. Volobouev12, J. Ye12, M. Artuso13, A. Efimov13, F. Frasconi13, M. Gao13, M. Goldberg13, D. He13, S. Kopp13, G. C. Moneti13, R. Mountain13, Y. Mukhin13, S. Schuh13, T. Skwarnicki13, S. Stone13, G. Viehhauser13, X. Xing13, J. Bartelt14, S. E. Csorna14, V. Jain14, S. Marka14, A. Freyberger15, D. Gibaut15, R. Godang15, K. Kinoshita15, I. C. Lai15, P. Pomianowski15, S. Schrenk15, G. Bonvicini16, D. Cinabro16, R. Greene16, L. P. Perera16, B. Barish17, M. Chadha17, S. Chan17, G. Eigen17, J. S. Miller17, C. O’Grady17, M. Schmidtler17, J. Urheim17, A. J. Weinstein17, F. Würthwein17, D. M. Asner18, D. W. Bliss18, W. S. Brower18, G. Masek18, H. P. Paar18, J. Gronberg19, R. Kutschke19, D. J. Lange19, S. Menary19, R. J. Morrison19, S. Nakanishi19, H. N. Nelson19, T. K. Nelson19, C. Qiao19, J. D. Richman19, D. Roberts19, A. Ryd19, H. Tajima19, M. S. Witherell19, R. Balest20, B. H. Behrens20, K. Cho20, W. T. Ford20, H. Park20, P. Rankin20, J. Roy20, J. G. Smith20, J. P. Alexander21, C. Bebek21, B. E. Berger21, K. Berkelman21, K. Bloom21, D. G. Cassel21, H. A. Cho21, D. M. Coffman21, D. S. Crowcroft21, M. Dickson21, P. S. Drell21, K. M. Ecklund21, R. Ehrlich21, R. Elia21, A. D. Foland21, P. Gaidarev21, R. S. Galik21, B. Gittelman21, S. W. Gray21, D. L. Hartill21, B. K. Heltsley21, P. I. Hopman21, S. L. Jones21, J. Kandaswamy21, N. Katayama21, P. C. Kim21, D. L. Kreinick21, T. Lee21, Y. Liu21, G. S. Ludwig21, J. Masui21, J. Mevissen21, N. B. Mistry21, C. R. Ng21, E. Nordberg21, M. Ogg21, J. R. Patterson21, D. Peterson21, D. Riley21, A. Soffer21, C. Ward21, M. Athanas22, P. Avery22, C. D. Jones22, M. Lohner22, C. Prescott22, S. Yang22, J. Yelton22, J. Zheng22, G. Brandenburg23, R. A. Briere23, Y. S. Gao23, D. Y.-J. Kim23, R. Wilson23, H. Yamamoto23, T. E. Browder24, F. Li24, Y. Li24, J. L. Rodriguez24, T. Bergfeld25, B. I. Eisenstein25, J. Ernst25, G. E. Gladding25, G. D. Gollin25, R. M. Hans25, E. Johnson25, I. Karliner25, M. A. Marsh25, M. Palmer25, M. Selen25, and J. J. Thaler25 (CLEO Collaboration)
1Carleton University, Ottawa, Ontario, Canada K1S 5B6
the Institute of Particle Physics, Canada
2McGill University, Montréal, Québec, Canada H3A 2T8
the Institute of Particle Physics, Canada
3Ithaca College, Ithaca, New York 14850
4University of Kansas, Lawrence, Kansas 66045
5University of Minnesota, Minneapolis, Minnesota 55455
6State University of New York at Albany, Albany, New York 12222
7Ohio State University, Columbus, Ohio 43210
8University of Oklahoma, Norman, Oklahoma 73019
9Purdue University, West Lafayette, Indiana 47907
10University of Rochester, Rochester, New York 14627
11Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309
12Southern Methodist University, Dallas, Texas 75275
13Syracuse University, Syracuse, New York 13244
14Vanderbilt University, Nashville, Tennessee 37235
15Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
16Wayne State University, Detroit, Michigan 48202
17California Institute of Technology, Pasadena, California 91125
18University of California, San Diego, La Jolla, California 92093
19University of California, Santa Barbara, California 93106
20University of Colorado, Boulder, Colorado 80309-0390
21Cornell University, Ithaca, New York 14853
22University of Florida, Gainesville, Florida 32611
23Harvard University, Cambridge, Massachusetts 02138
24University of Hawaii at Manoa, Honolulu, Hawaii 96822
25University of Illinois, Champaign-Urbana, Illinois 61801
Received 12 November 1996; published in the issue dated 1 April 1997
A search for the lepton-family-number-violating decays τ→eγ and τ→μγ has been performed using CLEO II data. No evidence of a signal has been found and the corresponding upper limits are B(τ→eγ)<2.7×10-6 and B(τ→μγ)<3.0×10-6 at 90% C.L.
© 1997 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.55.R3919
DOI:
10.1103/PhysRevD.55.R3919
PACS:
13.35.Dx, 11.30.Fs, 14.60.Fg
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