Phys. Rev. D
76,
072002
(2007)
[13 pages]
Measurement of B(Ds+→l+ν) and the decay constant fDS+
T. K. Pedlar et al. CLEO Collaboration
Show All Authors/Affiliations
Hide All Authors/Affiliations
T. K. Pedlar1, D. Cronin-Hennessy2, K. Y. Gao2, J. Hietala2, Y. Kubota2, T. Klein2, B. W. Lang2, R. Poling2, A. W. Scott2, A. Smith2, P. Zweber2, S. Dobbs3, Z. Metreveli3, K. K. Seth3, A. Tomaradze3, J. Ernst4, K. M. Ecklund5, H. Severini6, W. Love7, V. Savinov7, O. Aquines8, A. Lopez8, S. Mehrabyan8, H. Mendez8, J. Ramirez8, G. S. Huang9, D. H. Miller9, V. Pavlunin9, B. Sanghi9, I. P. J. Shipsey9, B. Xin9, G. S. Adams10, M. Anderson10, J. P. Cummings10, I. Danko10, D. Hu10, B. Moziak10, J. Napolitano10, Q. He11, J. Insler11, H. Muramatsu11, C. S. Park11, E. H. Thorndike11, F. Yang11, M. Artuso12, S. Blusk12, J. Butt12, S. Khalil12, J. Li12, N. Menaa12, R. Mountain12, S. Nisar12, K. Randrianarivony12, R. Sia12, T. Skwarnicki12, S. Stone12, J. C. Wang12, G. Bonvicini13, D. Cinabro13, M. Dubrovin13, A. Lincoln13, D. M. Asner14, K. W. Edwards14, P. Naik14, R. A. Briere15, T. Ferguson15, G. Tatishvili15, H. Vogel15, M. E. Watkins15, J. L. Rosner16, N. E. Adam17, J. P. Alexander17, D. G. Cassel17, J. E. Duboscq17, R. Ehrlich17, L. Fields17, L. Gibbons17, R. Gray17, S. W. Gray17, D. L. Hartill17, B. K. Heltsley17, D. Hertz17, C. D. Jones17, J. Kandaswamy17, D. L. Kreinick17, V. E. Kuznetsov17, H. Mahlke-Krüger17, D. Mohapatra17, P. U. E. Onyisi17, J. R. Patterson17, D. Peterson17, J. Pivarski17, D. Riley17, A. Ryd17, A. J. Sadoff17, H. Schwarthoff17, X. Shi17, S. Stroiney17, W. M. Sun17, T. Wilksen17, S. B. Athar18, R. Patel18, J. Yelton18, P. Rubin19, C. Cawlfield20, B. I. Eisenstein20, I. Karliner20, D. Kim20, N. Lowrey20, M. Selen20, E. J. White20, J. Wiss20, R. E. Mitchell21, M. R. Shepherd21, and D. Besson22 (CLEO Collaboration)
1Luther College, Decorah, Iowa 52101, USA
2University of Minnesota, Minneapolis, Minnesota 55455, USA
3Northwestern University, Evanston, Illinois 60208, USA
4State University of New York at Albany, Albany, New York 12222, USA
5State University of New York at Buffalo, Buffalo, New York 14260, USA
6University of Oklahoma, Norman, Oklahoma 73019, USA
7University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
8University of Puerto Rico, Mayaguez, Puerto Rico 00681
9Purdue University, West Lafayette, Indiana 47907, USA
10Rensselaer Polytechnic Institute, Troy, New York 12180, USA
11University of Rochester, Rochester, New York 14627, USA
12Syracuse University, Syracuse, New York 13244, USA
13Wayne State University, Detroit, Michigan 48202, USA
14Carleton University, Ottawa, Ontario, Canada K1S 5B6
15Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
16Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
17Cornell University, Ithaca, New York 14853, USA
18University of Florida, Gainesville, Florida 32611, USA
19George Mason University, Fairfax, Virginia 22030, USA
20University of Illinois, Urbana-Champaign, Illinois 61801, USA
21Indiana University, Bloomington, Indiana 47405, USA
22University of Kansas, Lawrence, Kansas 66045, USA
Received 2 April 2007; published 8 October 2007
We examine e+e-→Ds-Ds*+ and Ds*-Ds+ interactions at 4170 MeV using the CLEO-c detector in order to measure the decay constant fDs+. We use the Ds+→ℓ+ν channel, where the ℓ+ designates either a μ+ or a τ+, when the τ+→π+ν̅ . Analyzing both modes independently, we determine B(Ds+→μ+ν)=(0.594±0.066±0.031)%, and B(Ds+→τ+ν)=(8.0±1.3±0.4)%. We also analyze them simultaneously to find an effective value of Beff(Ds+→μ+ν)=(0.638±0.059±0.033)% and extract fDs+=274±13±7 MeV. Combining with our previous determination of B(D+→μ+ν), we also find the ratio fDs+/fD+=1.23±0.11±0.04. We compare to current theoretical estimates. Finally, we find B(Ds+→e+ν)<1.3×10-4 at 90% confidence level.
© 2007 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.76.072002
DOI:
10.1103/PhysRevD.76.072002
|
|
