Phys. Rev. Lett.
79,
1221–1224
(1997)
Search for Neutrinoless τ Decays Involving π0 or η Mesons
G. Bonvicini et al. (CLEO Collaboration)
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G. Bonvicini1, D. Cinabro1, R. Greene1, L. P. Perera1, G. J. Zhou1, B. Barish2, M. Chadha2, S. Chan2, G. Eigen2, J. S. Miller2, C. O'Grady2, M. Schmidtler2, J. Urheim2, A. J. Weinstein2, F. Würthwein2, D. M. Asner3, D. W. Bliss3, W. S. Brower3, G. Masek3, H. P. Paar3, S. Prell3, V. Sharma3, J. Gronberg4, T. S. Hill4, R. Kutschke4, D. J. Lange4, S. Menary4, R. J. Morrison4, H. N. Nelson4, T. K. Nelson4, C. Qiao4, J. D. Richman4, D. Roberts4, A. Ryd4, M. S. Witherell4, R. Balest5, B. H. Behrens5, K. Cho5, W. T. Ford5, H. Park5, P. Rankin5, J. Roy5, J. G. Smith5, J. P. Alexander6, C. Bebek6, B. E. Berger6, K. Berkelman6, K. Bloom6, D. G. Cassel6, H. A. Cho6, D. M. Coffman6, D. S. Crowcroft6, M. Dickson6, P. S. Drell6, K. M. Ecklund6, R. Ehrlich6, R. Elia6, A. D. Foland6, P. Gaidarev6, R. S. Galik6, B. Gittelman6, S. W. Gray6, D. L. Hartill6, B. K. Heltsley6, P. I. Hopman6, J. Kandaswamy6, P. C. Kim6, D. L. Kreinick6, T. Lee6, Y. Liu6, G. S. Ludwig6, J. Masui6, J. Mevissen6, N. B. Mistry6, C. R. Ng6, E. Nordberg6, M. Ogg6, J. R. Patterson6, D. Peterson6, D. Riley6, A. Soffer6, B. Valant-Spaight6, C. Ward6, M. Athanas7, P. Avery7, C. D. Jones7, M. Lohner7, C. Prescott7, J. Yelton7, J. Zheng7, G. Brandenburg8, R. A. Briere8, Y. S. Gao8, D. Y.-J. Kim8, R. Wilson8, H. Yamamoto8, T. E. Browder9, F. Li9, Y. Li9, J. L. Rodriguez9, T. Bergfeld10, B. I. Eisenstein10, J. Ernst10, G. E. Gladding10, G. D. Gollin10, R. M. Hans10, E. Johnson10, I. Karliner10, M. A. Marsh10, M. Palmer10, M. Selen10, J. J. Thaler10, K. W. Edwards11,11b, A. Bellerive12,12b, R. Janicek12,12b, D. B. MacFarlane12,12b, K. W. McLean12,12b, P. M. Patel12,12b, A. J. Sadoff13, R. Ammar14, P. Baringer14, A. Bean14, D. Besson14, D. Coppage14, C. Darling14, R. Davis14, N. Hancock14, S. Kotov14, I. Kravchenko14, N. Kwak14, S. Anderson15, Y. Kubota15, M. Lattery15, S. J. Lee15, J. J. O'Neill15, S. Patton15, R. Poling15, T. Riehle15, V. Savinov15, A. Smith15, M. S. Alam16, S. B. Athar16, Z. Ling16, A. H. Mahmood16, H. Severini16, S. Timm16, F. Wappler16, A. Anastassov17, S. Blinov17, J. E. Duboscq17, K. D. Fisher17, D. Fujino17, K. K. Gan17, T. Hart17, K. Honscheid17, H. Kagan17, R. Kass17, J. Lee17, M. B. Spencer17, M. Sung17, A. Undrus17, R. Wanke17, A. Wolf17, M. M. Zoeller17, B. Nemati18, S. J. Richichi18, W. R. Ross18, P. Skubic18, M. Wood18, M. Bishai19, J. Fast19, E. Gerndt19, J. W. Hinson19, N. Menon19, D. H. Miller19, E. I. Shibata19, I. P. J. Shipsey19, M. Yurko19, L. Gibbons20, S. Glenn20, S. D. Johnson20, Y. Kwon20, S. Roberts20, E. H. Thorndike20, C. P. Jessop21, K. Lingel21, H. Marsiske21, M. L. Perl21, D. Ugolini21, R. Wang21, X. Zhou21, T. E. Coan22, V. Fadeyev22, I. Korolkov22, Y. Maravin22, I. Narsky22, V. Shelkov22, J. Staeck22, R. Stroynowski22, I. Volobouev22, J. Ye22, M. Artuso23, A. Efimov23, F. Frasconi23, M. Gao23, M. Goldberg23, D. He23, S. Kopp23, G. C. Moneti23, R. Mountain23, S. Schuh23, T. Skwarnicki23, S. Stone23, G. Viehhauser23, X. Xing23, J. Bartelt24, S. E. Csorna24, V. Jain24, S. Marka24, R. Godang25, K. Kinoshita25, I. C. Lai25, P. Pomianowski25, and S. Schrenk25 (CLEO Collaboration)
1Wayne State University, Detroit, Michigan 48202
2California Institute of Technology, Pasadena, California 91125
3University of California, San Diego, La Jolla, California 92093
4University of California, Santa Barbara, California 93106
5University of Colorado, Boulder, Colorado 80309-0390
6Cornell University, Ithaca, New York 14853
7University of Florida, Gainesville, Florida 32611
8Harvard University, Cambridge, Massachusetts 02138
9University at Hawaii at Manoa, Honolulu, Hawaii 96822
10University of Illinois, Champaign-Urbana, Illinois 61801
11Carleton University, Ottawa, Ontario, Canada K1S 5B6
11band the Institute of Particle Physics, Canada
12McGill University, Montréal, Québec, Canada H3A 2T8
12band the Institute of Particle Physics, Canada
13Ithaca College, Ithaca, New York 14850
14University of Kansas, Lawrence, Kansas 66045
15University of Minnesota, Minneapolis, Minnesota 55455
16State University of New York at Albany, Albany, New York 12222
17Ohio State University, Columbus, Ohio 43210
18University of Oklahoma, Norman, Oklahoma 73019
19Purdue University, West Lafayette, Indiana 47907
20University of Rochester, Rochester, New York 14627
21Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309
22Southern Methodist University, Dallas, Texas 75275
23Syracuse University, Syracuse, New York 13244
24Vanderbilt University, Nashville, Tennessee 37235
25Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
Received 17 April 1997; published in the issue dated 18 August 1997
We have searched for lepton flavor violating decays of the τ lepton using final states with an electron or a muon and one or two π0 or η mesons but no neutrinos. The data used in the search were collected with the CLEO II detector at the Cornell Electron Storage Ring (CESR) and correspond to an integrated luminosity of 4.68fb-1. No evidence for signals was found, resulting in much improved limits on the branching fractions for the one-meson modes and the first upper limits for the two-meson modes.
© 1997 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.79.1221
DOI:
10.1103/PhysRevLett.79.1221
PACS:
13.35.Dx, 11.30.Hv, 14.40.Aq
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