Observation of D⁺e⁺_e

Abstract

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R. E. Mitchell,¹ M. R. Shepherd,¹ D. Besson,² T. K. Pedlar,³ D. Cronin-Hennessy,⁴ K. Y. Gao,⁴ J. Hietala,⁴ Y. Kubota,⁴ T. Klein,⁴ B. W. Lang,⁴ R. Poling,⁴ A. W. Scott,⁴ A. Smith,⁴ P. Zweber,⁴ S. Dobbs,⁵ Z. Metreveli,⁵ K. K. Seth,⁵ A. Tomaradze,⁵ J. Ernst,⁶ K. M. Ecklund,⁷ H. Severini,⁸ W. Love,⁹ V. Savinov,⁹ O. Aquines,¹⁰ A. Lopez,¹⁰ S. Mehrabyan,¹⁰ H. Mendez,¹⁰ J. Ramirez,¹⁰ G. S. Huang,¹¹ D. H. Miller,¹¹ V. Pavlunin,¹¹ B. Sanghi,¹¹ I. P. J. Shipsey,¹¹ B. Xin,¹¹ G. S. Adams,¹² M. Anderson,¹² J. P. Cummings,¹² I. Danko,¹² D. Hu,¹² B. Moziak,¹² J. Napolitano,¹² Q. He,¹³ J. Insler,¹³ H. Muramatsu,¹³ C. S. Park,¹³ E. H. Thorndike,¹³ F. Yang,¹³ M. Artuso,¹⁴ S. Blusk,¹⁴ J. Butt,¹⁴ J. Li,¹⁴ N. Menaa,¹⁴ R. Mountain,¹⁴ S. Nisar,¹⁴ K. Randrianarivony,¹⁴ R. Sia,¹⁴ T. Skwarnicki,¹⁴ S. Stone,¹⁴ J. C. Wang,¹⁴ K. Zhang,¹⁴ G. Bonvicini,¹⁵ D. Cinabro,¹⁵ M. Dubrovin,¹⁵ A. Lincoln,¹⁵ D. M. Asner,¹⁶ K. W. Edwards,¹⁶ P. Naik,¹⁶ R. A. Briere,¹⁷ T. Ferguson,¹⁷ G. Tatishvili,¹⁷ H. Vogel,¹⁷ M. E. Watkins,¹⁷ J. L. Rosner,¹⁸ N. E. Adam,¹⁹ J. P. Alexander,¹⁹ D. G. Cassel,¹⁹ J. E. Duboscq,¹⁹ R. Ehrlich,¹⁹ L. Fields,¹⁹ R. S. Galik,¹⁹ L. Gibbons,¹⁹ R. Gray,¹⁹ S. W. Gray,¹⁹ D. L. Hartill,¹⁹ B. K. Heltsley,¹⁹ D. Hertz,¹⁹ C. D. Jones,¹⁹ J. Kandaswamy,¹⁹ D. L. Kreinick,¹⁹ V. E. Kuznetsov,¹⁹ H. Mahlke-Krüger,¹⁹ D. Mohapatra,¹⁹ P. U. E. Onyisi,¹⁹ J. R. Patterson,¹⁹ D. Peterson,¹⁹ J. Pivarski,¹⁹ D. Riley,¹⁹ A. Ryd,¹⁹ A. J. Sadoff,¹⁹ H. Schwarthoff,¹⁹ X. Shi,¹⁹ S. Stroiney,¹⁹ W. M. Sun,¹⁹ T. Wilksen,¹⁹ S. B. Athar,²⁰ R. Patel,²⁰ V. Potlia,²⁰ J. Yelton,²⁰ P. Rubin,²¹ C. Cawlfield,²² B. I. Eisenstein,²² I. Karliner,²² D. Kim,²² N. Lowrey,²² M. Selen,²² E. J. White,²² and J. Wiss²²

(CLEO Collaboration)

¹Indiana University, Bloomington, Indiana 47405, USA
²University of Kansas, Lawrence, Kansas 66045, USA
³Luther College, Decorah, Iowa 52101, USA
⁴University of Minnesota, Minneapolis, Minnesota 55455, USA
⁵Northwestern University, Evanston, Illinois 60208, USA
⁶State University of New York at Albany, Albany, New York 12222, USA
⁷State University of New York at Buffalo, Buffalo, New York 14260, USA
⁸University of Oklahoma, Norman, Oklahoma 73019, USA
⁹University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
¹⁰University of Puerto Rico, Mayaguez, Puerto Rico 00681
¹¹Purdue University, West Lafayette, Indiana 47907, USA
¹²Rensselaer Polytechnic Institute, Troy, New York 12180, USA
¹³University of Rochester, Rochester, New York 14627, USA
¹⁴Syracuse University, Syracuse, New York 13244, USA
¹⁵Wayne State University, Detroit, Michigan 48202, USA
¹⁶Carleton University, Ottawa, Ontario, Canada K1S 5B6
¹⁷Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
¹⁸Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
¹⁹Cornell University, Ithaca, New York 14853, USA
²⁰University of Florida, Gainesville, Florida 32611, USA
²¹George Mason University, Fairfax, Virginia 22030, USA
²²University of Illinois, Urbana-Champaign, Illinois 61801, USA

Received 27 February 2008; published 25 February 2009

Usinga 281 pb^-1 data sample collected at the psi (3770) resonance withthe CLEO-c detector at the Cornell Electron Storage Ring, wereport the first observation of D⁺ --> eta e⁺_e. We also set upperlimits for D⁺ --> eta e⁺_e and D⁺ --> phi e⁺_e that are about 2 ordersof magnitude more restrictive than those obtained by previous experiments.

URL:	http://link.aps.org/doi/10.1103/PhysRevLett.102.081801
DOI:	10.1103/PhysRevLett.102.081801
PACS:	13.20.Fc 13.20.Fc Leptonic/semileptonic/radiative decays of charmed mesons YEAR: 2009