Updated measurement of the strong phase in D0→K+π- decay using quantum correlations in e+e-→D0D̄0 at CLEO

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. StoneJ. C. Wang, L. M. Zhang, P. U.E. Onyisi, G. Bonvicini, D. Cinabro, A. Lincoln, M. J. Smith, P. Zhou, P. Naik, J. Rademacker, K. W. Edwards, E. J. White, R. A. Briere, H. Vogel, J. L. Rosner, J. P. Alexander, D. G. Cassel, S. Das, R. Ehrlich, L. Gibbons, S. W. Gray, D. L. Hartill, D. L. Kreinick, V. E. Kuznetsov, J. R. Patterson, D. Peterson, D. Riley, A. Ryd, A. J. Sadoff, X. Shi, S. Stroiney, W. M. Sun, J. Yelton, P. Rubin, N. Lowrey, S. Mehrabyan, M. Selen, J. Wiss, J. Libby, M. Kornicer, R. E. Mitchell, D. Besson, T. K. Pedlar, D. Cronin-Hennessy, J. Hietala, S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, T. Xiao, A. Powell, C. Thomas, G. Wilkinson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

39 Scopus citations


We analyze a sample of 3×106 quantum-correlated D0D̄0 pairs from 818pb-1 of e+e- collision data collected with the CLEO-c detector at Ecm=3.77GeV, to give an updated measurement of cos δ and a first determination of sin δ, where δ is the relative strong phase between doubly Cabibbo-suppressed D0→K+π- and Cabibbo-favored D ̄0→K+π- decay amplitudes. With no inputs from other experiments, we find cos δ=0.81-0.18-0.05+0.22+0.07, sin δ=-0.01±0.41±0.04, and |δ|=(10-53-0+28+13)°. By including external measurements of mixing parameters, we find alternative values of cos δ=1.15-0.17-0.08+0.19+0.00, sin δ=0.56-0.31-0.20+0.32+0.21, and δ=(18-17+11)°. Our results can be used to improve the world average uncertainty on the mixing parameter y by approximately 10%.

Original languageEnglish (US)
Article number112001
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number11
StatePublished - Dec 4 2012

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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