Phys. Rev. Lett. 95, 251801 (2005) [5 pages]
Improved Measurement of B(D+→μ+ν) and the Pseudoscalar Decay Constant fD+
M. Artuso et al. CLEO Collaboration
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M. Artuso1, C. Boulahouache1, S. Blusk1, J. Butt1, O. Dorjkhaidav1, J. Li1, N. Menaa1, R. Mountain1, R. Nandakumar1, K. Randrianarivony1, R. Redjimi1, R. Sia1, T. Skwarnicki1, S. Stone1, J. C. Wang1, K. Zhang1, S. E. Csorna2, G. Bonvicini3, D. Cinabro3, M. Dubrovin3, A. Lincoln3, R. A. Briere4, G. P. Chen4, J. Chen4, T. Ferguson4, G. Tatishvili4, H. Vogel4, M. E. Watkins4, J. L. Rosner5, N. E. Adam6, J. P. Alexander6, K. Berkelman6, D. G. Cassel6, V. Crede6, J. E. Duboscq6, K. M. Ecklund6, R. Ehrlich6, L. Fields6, L. Gibbons6, B. Gittelman6, R. Gray6, S. W. Gray6, D. L. Hartill6, B. K. Heltsley6, D. Hertz6, C. D. Jones6, J. Kandaswamy6, D. L. Kreinick6, V. E. Kuznetsov6, H. Mahlke-Krüger6, T. O. Meyer6, P. U. E. Onyisi6, J. R. Patterson6, D. Peterson6, E. A. Phillips6, J. Pivarski6, D. Riley6, A. Ryd6, A. J. Sadoff6, H. Schwarthoff6, X. Shi6, M. R. Shepherd6, S. Stroiney6, W. M. Sun6, D. Urner6, T. Wilksen6, K. M. Weaver6, M. Weinberger6, S. B. Athar7, P. Avery7, L. Breva-Newell7, R. Patel7, V. Potlia7, H. Stoeck7, J. Yelton7, P. Rubin8, C. Cawlfield9, B. I. Eisenstein9, G. D. Gollin9, I. Karliner9, D. Kim9, N. Lowrey9, P. Naik9, C. Sedlack9, M. Selen9, E. J. White9, J. Williams9, J. Wiss9, D. M. Asner10, K. W. Edwards10, D. Besson11, T. K. Pedlar12, D. Cronin-Hennessy13, K. Y. Gao13, D. T. Gong13, J. Hietala13, Y. Kubota13, T. Klein13, B. W. Lang13, S. Z. Li13, R. Poling13, A. W. Scott13, A. Smith13, S. Dobbs14, Z. Metreveli14, K. K. Seth14, A. Tomaradze14, P. Zweber14, J. Ernst15, H. Severini16, S. A. Dytman17, W. Love17, S. Mehrabyan17, J. A. Mueller17, V. Savinov17, Z. Li18, A. Lopez18, H. Mendez18, J. Ramirez18, G. S. Huang19, D. H. Miller19, V. Pavlunin19, B. Sanghi19, I. P. J. Shipsey19, G. S. Adams20, M. Anderson20, J. P. Cummings20, I. Danko20, J. Napolitano20, Q. He21, H. Muramatsu21, C. S. Park21, E. H. Thorndike21, T. E. Coan22, Y. S. Gao22, and F. Liu22 (CLEO Collaboration)
1Syracuse University, Syracuse, New York 13244, USA
2Vanderbilt University, Nashville, Tennessee 37235, USA
3Wayne State University, Detroit, Michigan 48202, USA
4Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
5Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
6Cornell University, Ithaca, New York 14853, USA
7University of Florida, Gainesville, Florida 32611, USA
8George Mason University, Fairfax, Virginia 22030, USA
9University of Illinois, Urbana-Champaign, Illinois 61801, USA
10Carleton University, Ottawa, Ontario, Canada K1S 5B6
11University of Kansas, Lawrence, Kansas 66045, USA
12Luther College, Decorah, Iowa 52101, USA
13University of Minnesota, Minneapolis, Minnesota 55455, USA
14Northwestern University, Evanston, Illinois 60208, USA
15State University of New York at Albany, Albany, New York 12222, USA
16University of Oklahoma, Norman, Oklahoma 73019, USA
17University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
18University of Puerto Rico, Mayaguez, Puerto Rico 00681
19Purdue University, West Lafayette, Indiana 47907, USA
20Rensselaer Polytechnic Institute, Troy, New York 12180, USA
21University of Rochester, Rochester, New York 14627, USA
22Southern Methodist University, Dallas, Texas 75275, USA
Received 29 August 2005; published 16 December 2005
We extract a relatively precise value for the decay constant of the D+ meson by measuring B(D+→μ+ν)=(4.40±0.66-0.12+0.09)×10-4 using 281 pb-1 of data taken on the ψ(3770) resonance with the CLEO-c detector. We find fD+=(222.6±16.7-3.4+2.8) MeV, and compare with current theoretical calculations. We also set a 90% confidence upper limit on B(D+→e+ν)<2.4×10-5 which constrains new physics models.
©2005 The American Physical Society
URL: http://link.aps.org/doi/10.1103/PhysRevLett.95.251801
DOI: 10.1103/PhysRevLett.95.251801
PACS: 13.20.Fc, 12.39.St, 13.66.Bc
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