Phys. Rev. D
78,
012001
(2008)
[24 pages]
Determination of the D0→K+π- relative strong phase using quantum-correlated measurements in e+e-→D0D̅ 0 at CLEO
D. M. Asner et al. CLEO Collaboration
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D. M. Asner1, K. W. Edwards1, P. Naik1, R. A. Briere2, T. Ferguson2, G. Tatishvili2, H. Vogel2, M. E. Watkins2, J. L. Rosner3, J. P. Alexander4, D. G. Cassel4, J. E. Duboscq4, R. Ehrlich4, L. Fields4, L. Gibbons4, R. Gray4, S. W. Gray4, D. L. Hartill4, B. K. Heltsley4, D. Hertz4, C. D. Jones4, J. Kandaswamy4, D. L. Kreinick4, V. E. Kuznetsov4, H. Mahlke-Krüger4, D. Mohapatra4, P. U. E. Onyisi4, J. R. Patterson4, D. Peterson4, D. Riley4, A. Ryd4, A. J. Sadoff4, X. Shi4, S. Stroiney4, W. M. Sun4, T. Wilksen4, S. B. Athar5, R. Patel5, J. Yelton5, P. Rubin6, B. I. Eisenstein7, I. Karliner7, S. Mehrabyan7, N. Lowrey7, M. Selen7, E. J. White7, J. Wiss7, R. E. Mitchell8, M. R. Shepherd8, D. Besson9, T. K. Pedlar10, D. Cronin-Hennessy11, K. Y. Gao11, J. Hietala11, Y. Kubota11, T. Klein11, B. W. Lang11, R. Poling11, A. W. Scott11, P. Zweber11, S. Dobbs12, Z. Metreveli12, K. K. Seth12, A. Tomaradze12, J. Libby13, A. Powell13, G. Wilkinson13, K. M. Ecklund14, W. Love15, V. Savinov15, A. Lopez16, H. Mendez16, J. Ramirez16, J. Y. Ge17, D. H. Miller17, B. Sanghi17, I. P. J. Shipsey17, B. Xin17, G. S. Adams18, M. Anderson18, J. P. Cummings18, I. Danko18, D. Hu18, B. Moziak18, J. Napolitano18, Q. He19, J. Insler19, H. Muramatsu19, C. S. Park19, E. H. Thorndike19, F. Yang19, M. Artuso20, S. Blusk20, S. Khalil20, J. Li20, R. Mountain20, S. Nisar20, K. Randrianarivony20, N. Sultana20, T. Skwarnicki20, S. Stone20, J. C. Wang20, L. M. Zhang20, G. Bonvicini21, D. Cinabro21, M. Dubrovin21, A. Lincoln21, and J. Rademacker22 (CLEO Collaboration)
1Carleton University, Ottawa, Ontario, Canada K1S 5B6
2Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
3Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
4Cornell University, Ithaca, New York 14853, USA
5University of Florida, Gainesville, Florida 32611, USA
6George Mason University, Fairfax, Virginia 22030, USA
7University of Illinois, Urbana-Champaign, Illinois 61801, USA
8Indiana University, Bloomington, Indiana 47405, USA
9University of Kansas, Lawrence, Kansas 66045, USA
10Luther College, Decorah, Iowa 52101, USA
11University of Minnesota, Minneapolis, Minnesota 55455, USA
12Northwestern University, Evanston, Illinois 60208, USA
13University of Oxford, Oxford OX1 3RH, United Kingdom
14State University of New York at Buffalo, Buffalo, New York 14260, U SA
15University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
16University of Puerto Rico, Mayaguez, Puerto Rico 00681
17Purdue University, West Lafayette, Indiana 47907, USA
18Rensselaer Polytechnic Institute, Troy, New York 12180, USA
19University of Rochester, Rochester, New York 14627, USA
20Syracuse University, Syracuse, New York 13244, USA
21Wayne State University, Detroit, Michigan 48202, USA
22University of Bristol, Bristol BS8 1TL, United Kingdom
Received 18 February 2008; published 30 July 2008
We exploit the quantum coherence between pair-produced D0 and D̅ 0 in ψ(3770) decays to study charm mixing, which is characterized by the parameters x and y, and to make a first determination of the relative strong phase δ between doubly Cabibbo-suppressed D0→K+π- and Cabibbo-favored D̅ 0→K+π-. We analyze a sample of 1.0×106 D0D̅ 0 pairs from 281 pb-1 of e+e- collision data collected with the CLEO-c detector at Ecm=3.77 GeV. By combining CLEO-c measurements with branching fraction input and time-integrated measurements of RM≡(x2+y2)/2 and RWS≡Γ(D0→K+π-)/Γ(D̅ 0→K+π-) from other experiments, we find cosδ=1.03-0.17+0.31±0.06, where the uncertainties are statistical and systematic, respectively. In addition, by further including external measurements of charm mixing parameters, we obtain an alternate measurement of cosδ=1.10±0.35±0.07, as well as xsinδ=(4.4-1.8+2.7±2.9)×10-3 and δ=(22-12-11+11+9)°.
© 2008 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.78.012001
DOI:
10.1103/PhysRevD.78.012001
PACS:
12.15.Ff, 13.20.Fc, 13.25.Ft, 14.40.Lb
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