Phys. Rev. Lett. 94, 011802 (2005) [5 pages]
Study of the Semileptonic Charm Decays D0→π-ℓ+ν and D0→K-ℓ+ν
G. S. Huang et al. CLEO Collaboration
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G. S. Huang1, D. H. Miller1, V. Pavlunin1, B. Sanghi1, E. I. Shibata1, I. P. J. Shipsey1, G. S. Adams2, M. Chasse2, J. P. Cummings2, I. Danko2, J. Napolitano2, D. Cronin-Hennessy3, C. S. Park3, W. Park3, J. B. Thayer3, E. H. Thorndike3, T. E. Coan4, Y. S. Gao4, F. Liu4, R. Stroynowski4, M. Artuso5, C. Boulahouache5, S. Blusk5, J. Butt5, E. Dambasuren5, O. Dorjkhaidav5, N. Menaa5, R. Mountain5, H. Muramatsu5, R. Nandakumar5, R. Redjimi5, R. Sia5, T. Skwarnicki5, S. Stone5, J. C. Wang5, K. Zhang5, A. H. Mahmood6, S. E. Csorna7, G. Bonvicini8, D. Cinabro8, M. Dubrovin8, A. Bornheim9, E. Lipeles9, S. P. Pappas9, A. J. Weinstein9, R. A. Briere10, G. P. Chen10, T. Ferguson10, G. Tatishvili10, H. Vogel10, M. E. Watkins10, N. E. Adam11, J. P. Alexander11, K. Berkelman11, D. G. Cassel11, J. E. Duboscq11, K. M. Ecklund11, R. Ehrlich11, L. Fields11, R. S. Galik11, L. Gibbons11, B. Gittelman11, R. Gray11, S. W. Gray11, D. L. Hartill11, B. K. Heltsley11, D. Hertz11, L. Hsu11, C. D. Jones11, J. Kandaswamy11, D. L. Kreinick11, V. E. Kuznetsov11, H. Mahlke-Krüger11, T. O. Meyer11, P. U. E. Onyisi11, J. R. Patterson11, T. K. Pedlar11, D. Peterson11, J. Pivarski11, D. Riley11, J. L. Rosner11 *, A. Ryd11, A. J. Sadoff11, H. Schwarthoff11, M. R. Shepherd11, W. M. Sun11, J. G. Thayer11, D. Urner11, T. Wilksen11, M. Weinberger11, S. B. Athar12, P. Avery12, L. Breva-Newell12, R. Patel12, V. Potlia12, H. Stoeck12, J. Yelton12, P. Rubin13, C. Cawlfield14, B. I. Eisenstein14, G. D. Gollin14, I. Karliner14, D. Kim14, N. Lowrey14, P. Naik14, C. Sedlack14, M. Selen14, J. J. Thaler14, J. Williams14, J. Wiss14, K. W. Edwards1,15, D. Besson16, K. Y. Gao17, D. T. Gong17, Y. Kubota17, S. Z. Li17, R. Poling17, A. W. Scott17, A. Smith17, C. J. Stepaniak17, J. Urheim17, Z. Metreveli18, K. K. Seth18, A. Tomaradze18, P. Zweber18, J. Ernst19, K. Arms20, K. K. Gan20, H. Severini21, P. Skubic21, D. M. Asner22, S. A. Dytman22, S. Mehrabyan22, J. A. Mueller22, V. Savinov22, Z. Li23, A. Lopez23, H. Mendez23, and J. Ramirez23 (CLEO Collaboration)
1Purdue University, West Lafayette, Indiana 47907, USA
2Rensselaer Polytechnic Institute, Troy, New York 12180, USA
3University of Rochester, Rochester, New York 14627, USA
4Southern Methodist University, Dallas, Texas 75275, USA
5Syracuse University, Syracuse, New York 13244, USA
6University of Texas - Pan American, Edinburg, Texas 78539, USA
7Vanderbilt University, Nashville, Tennessee 37235, USA
8Wayne State University, Detroit, Michigan 48202, USA
9California Institute of Technology, Pasadena, California 91125, USA
10Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
11Cornell University, Ithaca, New York 14853, USA
12University of Florida, Gainesville, Florida 32611, USA
13George Mason University, Fairfax, Virginia 22030, USA
14University of Illinois, Urbana-Champaign, Illinois 61801, USA
15Carleton University, Ottawa, Ontario, Canada K1S 5B6 and the Institute of Particle Physics, Canada
16University of Kansas, Lawrence, Kansas 66045, USA
17University of Minnesota, Minneapolis, Minnesota 55455, USA
18Northwestern University, Evanston, Illinois 60208, USA
19State University of New York at Albany, Albany, New York 12222, USA
20Ohio State University, Columbus, Ohio 43210, USA
21University of Oklahoma, Norman, Oklahoma 73019, USA
22University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
23University of Puerto Rico, Mayaguez, Puerto Rico 00681, USA
Received 19 July 2004; published 6 January 2005
We investigate the decays D0→π-ℓ+ν and D0→K-ℓ+ν, where ℓ is e or μ, using approximately 7 fb-1 of data collected with the CLEO III detector. We find R0≡B(D0→π-e+ν)/B(D0→K-e+ν)=0.082±0.006±0.005. Fits to the kinematic distributions of the data provide parameters describing the form factor of each mode. Combining the form factor results and R0 gives |f+π(0)|2|Vcd|2/|f+K(0)|2|Vcs|2=0.038-0.007-0.003+0.006+0.005.
©2005 The American Physical Society
URL: http://link.aps.org/doi/10.1103/PhysRevLett.94.011802
DOI: 10.1103/PhysRevLett.94.011802
PACS: 13.20.Fc, 12.38.Qk, 14.40.Lb
* On leave of absence from University of Chicago.
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