Phys. Rev. Lett.
73,
1079–1083
(1994)
Measurement of Cabibbo-Suppressed Decays of the τ Lepton
M. Battle et al.
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M. Battle1, J. Ernst1, Y. Kwon1, S. Roberts1, E. H. Thorndike1, C. H. Wang1, J. Dominick2, M. Lambrecht2, S. Sanghera2, V. Shelkov2, T. Skwarnicki2, R. Stroynowski2, I. Volobouev2, G. Wei2, P. Zadorozhny2, M. Artuso3, M. Goldberg3, D. He3, N. Horwitz3, R. Kennett3, R. Mountain3, G. C. Moneti3, F. Muheim3, Y. Muheim3, S. Playfer3, Y. Rozen3, S. Stone3, M. Thulasidas3, G. Vasseur3, G. Zhu3, J. Bartelt4, S. E. Csorna4, Z. Egyed4, V. Jain4, K. Kinoshita5, K. W. Edwards6, M. Ogg6, D. I. Britton7, E. R. F. Hyatt7, D. B. MacFarlane7, P. M. Patel7, D. S. Akerib8, B. Barish8, M. Chadha8, S. Chan8, D. F. Cowen8, G. Eigen8, J. S. Miller8, C. O'Grady8, J. Urheim8, A. J. Weinstein8, D. Acosta9, M. Athanas9, G. Masek9, H. P. Paar9, M. Sivertz9, J. Gronberg10, R. Kutschke10, S. Menary10, R. J. Morrison10, S. Nakanishi10, H. N. Nelson10, T. K. Nelson10, C. Qiao10, J. D. Richman10, A. Ryd10, H. Tajima10, D. Sperka10, M. S. Witherell10, M. Procario11, R. Balest12, K. Cho12, M. Daoudi12, W. T. Ford12, D. R. Johnson12, K. Lingel12, M. Lohner12, P. Rankin12, J. G. Smith12, J. P. Alexander13, C. Bebek13, K. Berkelman13, K. Bloom13, T. E. Browder13,*, D. G. Cassel13, H. A. Cho13, D. M. Coffman13, P. S. Drell13, R. Ehrlich13, P. Gaiderev13, R. S. Galik13, M. Garcia-Sciveres13, B. Geiser13, B. Gittelman13, S. W. Gray13, D. L. Hartill13, B. K. Heltsley13, C. D. Jones13, S. L. Jones13, J. Kandaswamy13, N. Katayama13, P. C. Kim13, D. L. Kreinick13, G. S. Ludwig13, J. Masui13, J. Mevissen13, N. B. Mistry13, C. R. Ng13, E. Nordberg13, J. R. Patterson13, D. Peterson13, D. Riley13, S. Salman13, M. Sapper13, F. Würthwein13, P. Avery14, A. Freyberger14, J. Rodriguez14, R. Stephens14, S. Yang14, J. Yelton14, D. Cinabro15, S. Henderson15, T. Liu15, M. Saulnier15, R. Wilson15, H. Yamamoto15, T. Bergfeld16, B. I. Eisenstein16, G. Gollin16, B. Ong16, M. Palmer16, M. Selen16, J. J. Thaler16, A. J. Sadoff17, R. Ammar18, S. Ball18, P. Baringer18, A. Bean18, D. Besson18, D. Coppage18, N. Copty18, R. Davis18, N. Hancock18, M. Kelly18, N. Kwak18, H. Lam18, Y. Kubota19, M. Lattery19, J. K. Nelson19, S. Patton19, D. Perticone19, R. Poling19, V. Savinov19, S. Schrenk19, R. Wang19, M. S. Alam20, I. J. Kim20, B. Nemati20, J. J. O'Neill20, H. Severini20, C. R. Sun20, M. M. Zoeller20, G. Crawford21, C. M. Daubenmier21, R. Fulton21, D. Fujino21, K. K. Gan21, K. Honscheid21, H. Kagan21, R. Kass21, J. Lee21, R. Malchow21, Y. Skovpen21,†, M. Sung21, C. White21, F. Butler22, X. Fu22, G. Kalbfleisch22, W. R. Ross22, P. Skubic22, J. Snow22, P. L. Wang22, M. Wood22, D. N. Brown23, J. Fast23, R. L. McIlwain23, T. Miao23, D. H. Miller23, M. Modesitt23, D. Payne23, E. I. Shibata23, I. P. J. Shipsey23, and P. N. Wang23
1University of Rochester, Rochester, New York 14627
2Southern Methodist University, Dallas, Texas 75275
3Syracuse University, Syracuse, New York 13244
4Vanderbilt University, Nashville, Tennessee 37235
5Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
6Carleton University, Ottawa, Ontario, Canada K1S 5B6 and the Institute of Particle Physics, Montréal, Canada
7McGill University, Montréal, Québec, Canada H3A 2T8 and the Institute of Particle Physics, Montréal, Canada
8California Institute of Technology, Pasadena, California 91125
9University of California, San Diego, La Jolla, California 92093
10University of California, Santa Barbara, California 93106
11Carnegie-Mellon University, Pittsburgh, Pennsylvania 15213
12University of Colorado, Boulder, Colorado 80309-0390
13Cornell University, Ithaca, New York 14853
14University of Florida, Gainesville, Florida 32611
15Harvard University, Cambridge, Massachusetts 02138
16University of Illinois, Champaign-Urbana, Illinois 61801
17Ithaca College, Ithaca, New York 14850
18University of Kansas, Lawrence, Kansas 66045
19University of Minnesota, Minneapolis, Minnesota 55455
20State University of New York at Albany, Albany, New York 12222
21Ohio State University, Columbus, Ohio 43210
22University of Oklahoma, Norman, Oklahoma 73019
23Purdue University, West Lafayette, Indiana 47907
Received 4 February 1994; published in the issue dated 22 August 1994
Branching ratios for the dominant Cabibbo-suppressed decays of the τ lepton have been measured by CLEO II in e+e- annihilation at the Cornell Electron Storage Ring (√s∼10.6 GeV) using kaons with momenta below 0.7 GeV/c. The inclusive branching ratio into one charged kaon is (1.60 ± 0.12 ± 0.19)%. For the exclusive decays, B(τ-→K-ντ)=(0.66±0.07±0.09)%, B(τ-→K-π0ντ)=(0.51±0.10±0.07)%, and, based on three events, B(τ-→K-2π0ντ)<0.3% at the 90% confidence level. These represent significant improvements over previous results. B(τ-→K-π0ντ) is measured for the first time with exclusive π0 reconstruction.
© 1994 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.73.1079
DOI:
10.1103/PhysRevLett.73.1079
*Permanent address: University of Hawaii at Manoa, Honolulu, HI 96822. †Permanent address: INP, Novosibirsk, Russia.
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