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arXiv · 1010.2817

Model-independent determination of the strong-phase difference between D^0 and D^0-bar-> K^0_S,L h^+ h^- (h=pi,K) and its impact on the measurement of the CKM angle gamma/phi_3

J. Libby·M. Kornicer·R. E. Mitchell·M. R. Shepherd·C. M. Tarbert·D. Besson·T. K. Pedlar·J. Xavier·D. Cronin-Hennessy·J. Hietala·P. Zweber·S. Dobbs·Z. Metreveli·K. K. Seth·A. Tomaradze·T. Xiao·S. Brisbane·S. Malde·L. Martin·A. Powell·P. Spradlin·G. Wilkinson·H. Mendez·J. Y. Ge·D. H. Miller·I. P. J. Shipsey·B. Xin·G. S. Adams·D. Hu·B. Moziak·J. Napolitano·K. M. Ecklund·J. Insler·H. Muramatsu·C. S. Park·L. J. Pearson·E. H. Thorndike·F. Yang·S. Ricciardi·C. Thomas·M. Artuso·S. Blusk·N. Horwitz·R. Mountain·T. Skwarnicki·S. Stone·J. C. Wang·L. M. Zhang·T. Gershon·G. Bonvicini·D. Cinabro·A. Lincoln·M. J. Smith·P. Zhou·J. Zhu·P. Naik·J. Rademacker·D. M. Asner·K. W. Edwards·K. Randrianarivony·G. Tatishvili·R. A. Briere·H. Vogel·P. U. E. Onyisi·J. L. Rosner·J. P. Alexander D. G. Cassel·S. Das·R. Ehrlich·L. Fields·L. Gibbons·S. W. Gray D. L. Hartill·B. K. Heltsley·D. L. Kreinick·V. E. Kuznetsov J. R. Patterson D. Peterson·D. Riley·A. Ryd·A. J. Sadoff X. Shi·W. M. Sun·J. Yelton·P. Rubin·N. Lowrey·S. Mehrabyan·M. Selen·J. Wiss
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Abstract

We report the first determination of the relative strong-phase difference between D^0 -> K^0_S,L K^+ K^- and D^0-bar -> K^0_S,L K^+ K^-. In addition, we present updated measurements of the relative strong-phase difference between D^0 -> K^0_S,L pi^+ pi^- and D^0-bar -> K^0_S,L pi^+ pi^-. Both measurements exploit the quantum coherence between a pair of D^0 and D^0-bar mesons produced from psi(3770) decays. The strong-phase differences measured are important for determining the Cabibbo-Kobayashi-Maskawa angle gamma/phi_3 in B^- -> K^- D^0-tilde decays, where D^0-tilde is a D^0 or D^0-bar meson decaying to K^0_S h^+ h^- (h=pi,K), in a manner independent of the model assumed to describe the D^0 -> K^0_S h^+ h^- decay. Using our results, the uncertainty in gamma/phi_3 due to the error on the strong-phase difference is expected to be between 1.7 and 3.9 degrees for an analysis using B^- K^- D^0-tilde D^0-tilde -> K^0_S pi^+ pi^- decays, and between 3.2 and 3.9 degrees for an analysis based on B^- -> K^- D^0-tilde, D^0-tilde -> K^0_S K^+ K^- decays. A measurement is also presented of the CP-odd fraction, F_-, of the decay D^0 -> K^0_S K^+ K^- in the region of the phi -> K^+ K^- resonance. We find that in a region within 0.01 GeV^2/c^4 of the nominal phi mass squared F_- > 0.91 at the 90% confidence level.

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J. Libby, M. Kornicer, R. E. Mitchell, M. R. Shepherd, C. M. Tarbert, D. Besson, T. K. Pedlar, J. Xavier, D. Cronin-Hennessy, J. Hietala, P. Zweber, S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, T. Xiao, S. Brisbane, S. Malde, L. Martin, A. Powell, P. Spradlin, G. Wilkinson, H. Mendez, J. Y. Ge, D. H. Miller, I. P. J. Shipsey, B. Xin, G. S. Adams, D. Hu, B. Moziak, J. Napolitano, K. M. Ecklund, J. Insler, H. Muramatsu, C. S. Park, L. J. Pearson, E. H. Thorndike, F. Yang, S. Ricciardi, C. Thomas, M. Artuso, S. Blusk, N. Horwitz, R. Mountain, T. Skwarnicki, S. Stone, J. C. Wang, L. M. Zhang, T. Gershon, G. Bonvicini, D. Cinabro, A. Lincoln, M. J. Smith, P. Zhou, J. Zhu, P. Naik, J. Rademacker, D. M. Asner, K. W. Edwards, K. Randrianarivony, G. Tatishvili, R. A. Briere, H. Vogel, P. U. E. Onyisi, J. L. Rosner, J. P. Alexander D. G. Cassel, S. Das, R. Ehrlich, L. Fields, L. Gibbons, S. W. Gray D. L. Hartill, B. K. Heltsley, D. L. Kreinick, V. E. Kuznetsov J. R. Patterson D. Peterson, D. Riley, A. Ryd, A. J. Sadoff X. Shi, W. M. Sun, J. Yelton, P. Rubin, N. Lowrey, S. Mehrabyan, M. Selen, J. Wiss. 2010-10-14. Model-independent determination of the strong-phase difference between D^0 and D^0-bar-> K^0_S,L h^+ h^- (h=pi,K) and its impact on the measurement of the CKM angle gamma/phi_3. https://doi.org/10.1103/physrevd.82.112006

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