Study of the Decays D⁰^-e⁺_e, D⁰K^-e⁺_e, D⁺⁰e⁺_e, and D⁺⁰e⁺_e

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D. Cronin-Hennessy,¹ K. Y. Gao,¹ D. T. Gong,¹ J. Hietala,¹ Y. Kubota,¹ T. Klein,¹ B. W. Lang,¹ R. Poling,¹ A. W. Scott,¹ A. Smith,¹ P. Zweber,¹ S. Dobbs,² Z. Metreveli,² K. K. Seth,² A. Tomaradze,² J. Ernst,³ H. Severini,⁴ S. A. Dytman,⁵ W. Love,⁵ V. Savinov,⁵ O. Aquines,⁶ Z. Li,⁶ A. Lopez,⁶ S. Mehrabyan,⁶ H. Mendez,⁶ J. Ramirez,⁶ G. S. Huang,⁷ D. H. Miller,⁷ V. Pavlunin,⁷ B. Sanghi,⁷ I. P. J. Shipsey,⁷ B. Xin,⁷ G. S. Adams,⁸ M. Anderson,⁸ J. P. Cummings,⁸ I. Danko,⁸ J. Napolitano,⁸ Q. He,⁹ J. Insler,⁹ H. Muramatsu,⁹ C. S. Park,⁹ E. H. Thorndike,⁹ F. Yang,⁹ T. E. Coan,¹⁰ Y. S. Gao,¹⁰ F. Liu,¹⁰ M. Artuso,¹¹ S. Blusk,¹¹ J. Butt,¹¹ J. Li,¹¹ N. Menaa,¹¹ R. Mountain,¹¹ S. Nisar,¹¹ K. Randrianarivony,¹¹ R. Redjimi,¹¹ R. Sia,¹¹ T. Skwarnicki,¹¹ S. Stone,¹¹ J. C. Wang,¹¹ K. Zhang,¹¹ S. E. Csorna,¹² G. Bonvicini,¹³ D. Cinabro,¹³ M. Dubrovin,¹³ A. Lincoln,¹³ D. M. Asner,¹⁴ K. W. Edwards,¹⁴ R. A. Briere,¹⁵ I. Brock,¹⁵ J. Chen,¹⁵ T. Ferguson,¹⁵ G. Tatishvili,¹⁵ H. Vogel,¹⁵ M. E. Watkins,¹⁵ J. L. Rosner,¹⁶ N. E. Adam,¹⁷ J. P. Alexander,¹⁷ K. Berkelman,¹⁷ D. G. Cassel,¹⁷ J. E. Duboscq,¹⁷ K. M. Ecklund,¹⁷ R. Ehrlich,¹⁷ L. Fields,¹⁷ L. Gibbons,¹⁷ R. Gray,¹⁷ S. W. Gray,¹⁷ D. L. Hartill,¹⁷ B. K. Heltsley,¹⁷ D. Hertz,¹⁷ C. D. Jones,¹⁷ J. Kandaswamy,¹⁷ D. L. Kreinick,¹⁷ V. E. Kuznetsov,¹⁷ H. Mahlke-Krüger,¹⁷ P. U. E. Onyisi,¹⁷ J. R. Patterson,¹⁷ D. Peterson,¹⁷ J. Pivarski,¹⁷ D. Riley,¹⁷ A. Ryd,¹⁷ A. J. Sadoff,¹⁷ H. Schwarthoff,¹⁷ X. Shi,¹⁷ S. Stroiney,¹⁷ W. M. Sun,¹⁷ T. Wilksen,¹⁷ M. Weinberger,¹⁷ S. B. Athar,¹⁸ R. Patel,¹⁸ V. Potlia,¹⁸ J. Yelton,¹⁸ P. Rubin,¹⁹ C. Cawlfield,²⁰ B. I. Eisenstein,²⁰ I. Karliner,²⁰ D. Kim,²⁰ N. Lowrey,²⁰ P. Naik,²⁰ C. Sedlack,²⁰ M. Selen,²⁰ E. J. White,²⁰ J. Wiss,²⁰ M. R. Shepherd,²¹ D. Besson,²² and T. K. Pedlar²³

(CLEO Collaboration)

¹University of Minnesota, Minneapolis, Minnesota 55455, USA
²Northwestern University, Evanston, Illinois 60208, USA
³State University of New York at Albany, Albany, New York 12222, USA
⁴University of Oklahoma, Norman, Oklahoma 73019, USA
⁵University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
⁶University of Puerto Rico, Mayaguez, Puerto Rico 00681
⁷Purdue University, West Lafayette, Indiana 47907, USA
⁸Rensselaer Polytechnic Institute, Troy, New York 12180, USA
⁹University of Rochester, Rochester, New York 14627, USA
¹⁰Southern Methodist University, Dallas, Texas 75275, USA
¹¹Syracuse University, Syracuse, New York 13244, USA
¹²Vanderbilt University, Nashville, Tennessee 37235, 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
²³Luther College, Decorah, Iowa 52101, USA

Received 5 December 2007; published 27 June 2008

Byusing 1.8×10⁶ D [overline D] pairs, we have measured [script B] (D⁰ --> ^-e⁺_e)=0.299(11)(9)%, (D⁺ --> ⁰e⁺_e)=0.373(22)(13)%, (D⁰ --> K^-e⁺_e)=3.56(3)(9)%,and (D⁺ --> [overline K] ⁰e⁺_e)=8.53(13)(23)% and have studied the q² dependence of theform factors. By combining our results with recent lattice calculations,we obtain |V_cd|=0.217(9)(4)(23) and |V_cs|=1.015(10)(11)(106).

URL:	http://link.aps.org/doi/10.1103/PhysRevLett.100.251802
DOI:	10.1103/PhysRevLett.100.251802
PACS:	13.20.Fc; 12.15.Hh; 14.40.Lb 13.20.Fc Leptonic/semileptonic/radiative decays of charmed mesons 12.15.Hh Determination of electroweak Kobayashi-Maskawa matrix elements 14.40.Lb Charmed mesons YEAR: 2008