First Observation of the Decay Dp

Abstract

References (7)

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S. B. Athar,¹ R. Patel,¹ J. Yelton,¹ P. Rubin,² B. I. Eisenstein,³ I. Karliner,³ S. Mehrabyan,³ N. Lowrey,³ M. Selen,³ E. J. White,³ J. Wiss,³ R. E. Mitchell,⁴ M. R. Shepherd,⁴ D. Besson,⁵ T. K. Pedlar,⁶ D. Cronin-Hennessy,⁷ K. Y. Gao,⁷ J. Hietala,⁷ Y. Kubota,⁷ T. Klein,⁷ B. W. Lang,⁷ R. Poling,⁷ A. W. Scott,⁷ P. Zweber,⁷ S. Dobbs,⁸ Z. Metreveli,⁸ K. K. Seth,⁸ A. Tomaradze,⁸ J. Libby,⁹ A. Powell,⁹ G. Wilkinson,⁹ K. M. Ecklund,¹⁰ W. Love,¹¹ V. Savinov,¹¹ A. Lopez,¹² H. Mendez,¹² J. Ramirez,¹² J. Y. Ge,¹³ D. H. Miller,¹³ I. P. J. Shipsey,¹³ B. Xin,¹³ G. S. Adams,¹⁴ M. Anderson,¹⁴ J. P. Cummings,¹⁴ I. Danko,¹⁴ D. Hu,¹⁴ B. Moziak,¹⁴ J. Napolitano,¹⁴ Q. He,¹⁵ J. Insler,¹⁵ H. Muramatsu,¹⁵ C. S. Park,¹⁵ E. H. Thorndike,¹⁵ F. Yang,¹⁵ M. Artuso,¹⁶ S. Blusk,¹⁶ S. Khalil,¹⁶ J. Li,¹⁶ R. Mountain,¹⁶ S. Nisar,¹⁶ K. Randrianarivony,¹⁶ N. Sultana,¹⁶ T. Skwarnicki,¹⁶ S. Stone,¹⁶ J. C. Wang,¹⁶ L. M. Zhang,¹⁶ G. Bonvicini,¹⁷ D. Cinabro,¹⁷ M. Dubrovin,¹⁷ A. Lincoln,¹⁷ P. Naik,¹⁸ J. Rademacker,¹⁸ D. M. Asner,¹⁹ K. W. Edwards,¹⁹ J. Reed,¹⁹ R. A. Briere,²⁰ T. Ferguson,²⁰ G. Tatishvili,²⁰ H. Vogel,²⁰ M. E. Watkins,²⁰ J. L. Rosner,²¹ J. P. Alexander,²² D. G. Cassel,²² J. E. Duboscq,²² R. Ehrlich,²² L. Fields,²² L. Gibbons,²² R. Gray,²² S. W. Gray,²² D. L. Hartill,²² B. K. Heltsley,²² D. Hertz,²² J. M. Hunt,²² J. Kandaswamy,²² D. L. Kreinick,²² V. E. Kuznetsov,²² J. Ledoux,²² H. Mahlke-Krüger,²² D. Mohapatra,²² P. U. E. Onyisi,²² J. R. Patterson,²² D. Peterson,²² D. Riley,²² A. Ryd,²² A. J. Sadoff,²² X. Shi,²² S. Stroiney,²² W. M. Sun,²² and T. Wilksen²²

(CLEO Collaboration)

¹University of Florida, Gainesville, Florida 32611, USA
²George Mason University, Fairfax, Virginia 22030, USA
³University of Illinois, Urbana-Champaign, Illinois 61801, USA
⁴Indiana University, Bloomington, Indiana 47405, USA
⁵University of Kansas, Lawrence, Kansas 66045, USA
⁶Luther College, Decorah, Iowa 52101, USA
⁷University of Minnesota, Minneapolis, Minnesota 55455, USA
⁸Northwestern University, Evanston, Illinois 60208, USA
⁹University of Oxford, Oxford OX1 3RH, United Kingdom
¹⁰State University of New York at Buffalo, Buffalo, New York 14260, USA
¹¹University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
¹²University of Puerto Rico, Mayaguez, Puerto Rico 00681
¹³Purdue University, West Lafayette, Indiana 47907, USA
¹⁴Rensselaer Polytechnic Institute, Troy, New York 12180, USA
¹⁵University of Rochester, Rochester, New York 14627, USA
¹⁶Syracuse University, Syracuse, New York 13244, USA
¹⁷Wayne State University, Detroit, Michigan 48202, USA
¹⁸University of Bristol, Bristol BS8 1TL, United Kingdom
¹⁹Carleton University, Ottawa, Ontario, Canada K1S 5B6
²⁰Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
²¹Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
²²Cornell University, Ithaca, New York 14853, USA

Received 7 March 2008; published 7 May 2008

Usinge⁺e^- --> D s*- D s+ data collected near the peak D_s production energy, E_cm=4170 MeV,with the CLEO-c detector, we present the first observation ofthe decay D --> p [overline n] . We measure a branching fraction [script B] (D --> p)=(1.30±0.36 -0.16+0.12 )×10^-3. Thisis the first observation of a charmed meson decaying intoa baryon-antibaryon final state.

URL:	http://link.aps.org/doi/10.1103/PhysRevLett.100.181802
DOI:	10.1103/PhysRevLett.100.181802
PACS:	13.25.Ft 13.25.Ft Hadronic decays of charmed mesons YEAR: 2008