APS » Phys. Rev. D » Volume 80 » Issue 3

N. Lowrey,¹ S. Mehrabyan,¹ M. Selen,¹ J. Wiss,¹ R. E. Mitchell,² M. R. Shepherd,² D. Besson,³ T. K. Pedlar,⁴ D. Cronin-Hennessy,⁵ K. Y. Gao,⁵ J. Hietala,⁵ Y. Kubota,⁵ T. Klein,⁵ R. Poling,⁵ A. W. Scott,⁵ P. Zweber,⁵ S. Dobbs,⁶ Z. Metreveli,⁶ K. K. Seth,⁶ B. J. Y. Tan,⁶ A. Tomaradze,⁶ J. Libby,⁷ L. Martin,⁷ N. Harnew,⁷ A. Powell,⁷ G. Wilkinson,⁷ H. Mendez,⁸ J. Y. Ge,⁹ D. H. Miller,⁹ I. P. J. Shipsey,⁹ B. Xin,⁹ G. S. Adams,¹⁰ D. Hu,¹⁰ B. Moziak,¹⁰ J. Napolitano,¹⁰ K. M. Ecklund,¹¹ Q. He,¹² J. Insler,¹² H. Muramatsu,¹² C. S. Park,¹² E. H. Thorndike,¹² F. Yang,¹² M. Artuso,¹³ S. Blusk,¹³ S. Khalil,¹³ J. Li,¹³ R. Mountain,¹³ K. Randrianarivony,¹³ N. Sultana,¹³ T. Skwarnicki,¹³ S. Stone,¹³ J. C. Wang,¹³ L. M. Zhang,¹³ T. Gershon,¹⁴ G. Bonvicini,¹⁵ D. Cinabro,¹⁵ M. Dubrovin,¹⁵ A. Lincoln,¹⁵ M. J. Smith,¹⁵ P. Zhou,¹⁵ J. Zhu,¹⁵ P. Naik,¹⁶ J. Rademacker,¹⁶ D. M. Asner,¹⁷ K. W. Edwards,¹⁷ J. Reed,¹⁷ A. N. Robichaud,¹⁷ G. Tatishvili,¹⁷ E. J. White,¹⁷ R. A. Briere,¹⁸ H. Vogel,¹⁸ P. U. E. Onyisi,¹⁹ J. L. Rosner,¹⁹ J. P. Alexander,²⁰ D. G. Cassel,²⁰ J. E. Duboscq,²⁰ R. Ehrlich,²⁰ L. Fields,²⁰ L. Gibbons,²⁰ R. Gray,²⁰ S. W. Gray,²⁰ D. L. Hartill,²⁰ B. K. Heltsley,²⁰ D. Hertz,²⁰ J. M. Hunt,²⁰ J. Kandaswamy,²⁰ D. L. Kreinick,²⁰ V. E. Kuznetsov,²⁰ J. Ledoux,²⁰ H. Mahlke-Krüger,²⁰ J. R. Patterson,²⁰ D. Peterson,²⁰ D. Riley,²⁰ A. Ryd,²⁰ A. J. Sadoff,²⁰ X. Shi,²⁰ S. Stroiney,²⁰ W. M. Sun,²⁰ T. Wilksen,²⁰ J. Yelton,²¹ and P. Rubin²²

(CLEO Collaboration)

¹University of Illinois, Urbana-Champaign, Illinois 61801, USA
²Indiana University, Bloomington, Indiana 47405, USA
³University of Kansas, Lawrence, Kansas 66045, USA
⁴Luther College, Decorah, Iowa 52101, USA
⁵University of Minnesota, Minneapolis, Minnesota 55455, USA
⁶Northwestern University, Evanston, Illinois 60208, USA
⁷University of Oxford, Oxford OX1 3RH, UK
⁸University of Puerto Rico, Mayaguez, Puerto Rico 00681
⁹Purdue University, West Lafayette, Indiana 47907, USA
¹⁰Rensselaer Polytechnic Institute, Troy, New York 12180, USA
¹¹Rice University, Houston, Texas 77005, USA
¹²University of Rochester, Rochester, New York 14627, USA
¹³Syracuse University, Syracuse, New York 13244, USA
¹⁴University of Warwick, Coventry CV4 7AL, UK
¹⁵Wayne State University, Detroit, Michigan 48202, USA
¹⁶University of Bristol, Bristol BS8 1TL, UK
¹⁷Carleton University, Ottawa, Ontario K1S 5B6, Canada
¹⁸Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
¹⁹Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
²⁰Cornell University, Ithaca, New York 14853, USA
²¹University of Florida, Gainesville, Florida 32611, USA
²²George Mason University, Fairfax, Virginia 22030, USA

The first measurements of the coherence factors (R_Kpipi⁰ and R_K3pi) and the average strong-phase differences (delta_D^{K pi pi[sup 0]} and delta_D^{K3 pi}) for D⁰-->K^-pi⁺pi⁰ and D⁰-->K^-pi⁺pi⁺pi^- are presented. These parameters can be used to improve the determination of the unitarity triangle angle gamma in B^--->DK^- decays, where D is a D⁰ or [overline D]⁰ meson decaying to the same final state. The measurements are made using quantum-correlated, fully reconstructed D⁰[overline D]⁰ pairs produced in e⁺e^- collisions at the psi(3770) resonance. The measured values are: R_Kpipi⁰=0.84±0.07, delta_D^{K pi pi[sup 0]}=(227_-17⁺¹⁴)°, R_K3pi=0.33_-0.23^+0.20, and delta_D^{K3 pi}=(114_-23⁺²⁶)°. These results indicate significant coherence in the decay D⁰-->K^-pi⁺pi⁰, whereas lower coherence is observed in the decay D⁰-->K^-pi⁺pi⁺pi^-. The analysis also results in a small improvement in the knowledge of other D-meson parameters, in particular, the strong-phase difference for D⁰-->K^-pi⁺, delta_D^{K pi}, and the mixing parameter y.

©2009 The American Physical Society

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