E. White
University of Cincinnati
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Physical Review D | 2012
D. M. Asner; G. Tatishvili; J. Y. Ge; D. H. Miller; I. P. J. Shipsey; B. Xin; G. S. Adams; J. Napolitano; K. M. Ecklund; Q. He; J. Insler; H. Muramatsu; L. J. Pearson; E. H. Thorndike; M. Artuso; S. Blusk; N. Horwitz; R. Mountain; T. Skwarnicki; S. Stone; J. Wang; L. Zhang; Peter Onyisi; G. Bonvicini; D. Cinabro; A. Lincoln; M. J. Smith; Peng Zhou; P. Naik; J. H. Rademacker
We analyze a sample of 3 million quantum-correlated D0 D0bar pairs from 818 pb^-1 of e+e- collision data collected with the CLEO-c detector at E_cm = 3.77 GeV, to give an updated measurement of cosdelta and a first determination of sindelta, where delta is the relative strong phase between doubly Cabibbo-suppressed D0 --> K+pi- and Cabibbo-favored D0bar --> K+pi- decay amplitudes. With no inputs from other experiments, we find cosdelta = 0.81 +0.22+0.07 -0.18-0.05, sindelta = -0.01 +- 0.41 +- 0.04, and |delta| = 10 +28+13 -53-0 degrees. By including external measurements of mixing parameters, we find alternative values of cosdelta = 1.15 +0.19+0.00 -0.17-0.08, sindelta = 0.56 +0.32+0.21 -0.31-0.20, and delta = (18 +11-17) degrees. Our results can be used to improve the world average uncertainty on the mixing parameter y by approximately 10%.
