Phys. Rev. D
73,
112005
(2006)
[8 pages]
An investigation of D+→τ+ν
P. Rubin et al. CLEO Collaboration
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P. Rubin1, C. Cawlfield2, B. I. Eisenstein2, I. Karliner2, D. Kim2, N. Lowrey2, P. Naik2, C. Sedlack2, M. Selen2, E. J. White2, J. Wiss2, M. R. Shepherd3, D. Besson4, T. K. Pedlar5, D. Cronin-Hennessy6, K. Y. Gao6, D. T. Gong6, J. Hietala6, Y. Kubota6, T. Klein6, B. W. Lang6, R. Poling6, A. W. Scott6, A. Smith6, S. Dobbs7, Z. Metreveli7, K. K. Seth7, A. Tomaradze7, P. Zweber7, J. Ernst8, H. Severini9, S. A. Dytman10, W. Love10, V. Savinov10, O. Aquines11, Z. Li11, A. Lopez11, S. Mehrabyan11, H. Mendez11, J. Ramirez11, G. S. Huang12, D. H. Miller12, V. Pavlunin12, B. Sanghi12, I. P. J. Shipsey12, B. Xin12, G. S. Adams13, M. Anderson13, J. P. Cummings13, I. Danko13, J. Napolitano13, Q. He14, J. Insler14, H. Muramatsu14, C. S. Park14, E. H. Thorndike14, T. E. Coan15, Y. S. Gao15, F. Liu15, M. Artuso16, S. Blusk16, J. Butt16, J. Li16, N. Menaa16, R. Mountain16, S. Nisar16, K. Randrianarivony16, R. Redjimi16, R. Sia16, T. Skwarnicki16, S. Stone16, J. C. Wang16, K. Zhang16, S. E. Csorna17, G. Bonvicini18, D. Cinabro18, M. Dubrovin18, A. Lincoln18, D. M. Asner19, K. W. Edwards19, R. A. Briere20, I. Brock20, J. Chen20, T. Ferguson20, G. Tatishvili20, H. Vogel20, M. E. Watkins20, J. L. Rosner21, N. E. Adam22, J. P. Alexander22, K. Berkelman22, D. G. Cassel22, J. E. Duboscq22, K. M. Ecklund22, R. Ehrlich22, L. Fields22, L. Gibbons22, R. Gray22, S. W. Gray22, D. L. Hartill22, B. K. Heltsley22, D. Hertz22, C. D. Jones22, J. Kandaswamy22, D. L. Kreinick22, V. E. Kuznetsov22, H. Mahlke-Krüger22, T. O. Meyer22, P. U. E. Onyisi22, J. R. Patterson22, D. Peterson22, J. Pivarski22, D. Riley22, A. Ryd22, A. J. Sadoff22, H. Schwarthoff22, X. Shi22, S. Stroiney22, W. M. Sun22, T. Wilksen22, M. Weinberger22, S. B. Athar23, R. Patel23, V. Potlia23, H. Stoeck23, and J. Yelton23 (CLEO Collaboration)
1George Mason University, Fairfax, Virginia 22030, USA
2University of Illinois, Urbana-Champaign, Illinois 61801, USA
3Indiana University, Bloomington, Indiana 47405, USA
4University of Kansas, Lawrence, Kansas 66045, USA
5Luther College, Decorah, Iowa 52101, USA
6University of Minnesota, Minneapolis, Minnesota 55455, USA
7Northwestern University, Evanston, Illinois 60208, USA
8State University of New York at Albany, Albany, New York 12222, USA
9University of Oklahoma, Norman, Oklahoma 73019, USA
10University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
11University of Puerto Rico, Mayaguez, Puerto Rico 00681
12Purdue University, West Lafayette, Indiana 47907, USA
13Rensselaer Polytechnic Institute, Troy, New York 12180, USA
14University of Rochester, Rochester, New York 14627, USA
15Southern Methodist University, Dallas, Texas 75275, USA
16Syracuse University, Syracuse, New York 13244, USA
17Vanderbilt University, Nashville, Tennessee 37235, USA
18Wayne State University, Detroit, Michigan 48202, USA
19Carleton University, Ottawa, Ontario, Canada K1S 5B6
20Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
21Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
22Cornell University, Ithaca, New York 14853, USA
23University of Florida, Gainesville, Florida 32611, USA
Received 21 April 2006; published 9 June 2006
We test whether or not the τ lepton manifests the same couplings as the μ lepton by investigating the relative decay rates in purely leptonic D+ meson decays. We use 281 pb-1 of data accumulated at the ψ(3770) resonance with the CLEO-c detector, to limit B(D+→τ+ν)<2.1×10-3 at 90% confidence level (C.L.), thus allowing us to place the first upper limit on the ratio R=Γ(D+→τ+ν)/Γ(D+→μ+ν). The ratio of R to the standard model expectation of 2.65 then is <1.8 at 90% C.L., consistent with the prediction of lepton universality.
© 2006 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.73.112005
DOI:
10.1103/PhysRevD.73.112005
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