Studies of the decays D^0 \rightarrow K_S^0K^-π^+ and D^0 \rightarrow K_S^0K^+π^-
Creators: name: CLEO Collaboration
name: Insler, J.
name: Muramatsu, H.
name: Park, C. S.
name: Pearson, L. J.
name: Thorndike, E. H.
name: Ricciardi, S.
name: Thomas, C.
name: Artuso, M.
name: Blusk, S.
name: Mountain, R.
name: Skwarnicki, T.
name: Stone, S.
name: Wang, J. C.
name: Zhang, L. M.
name: Bonvicini, G.
name: Cinabro, D.
name: Smith, M. J.
name: Zhou, P.
name: Gershon, T.
name: Naik, P.
name: Rademacker, J.
name: Edwards, K. W.
name: Randrianarivony, K.
name: Briere, R. A.
name: Vogel, H.
name: Onyisi, P. U. E.
name: Rosner, J. L.
name: Alexander, J. P.
name: Cassel, D. G.
name: Das, S.
name: Ehrlich, R.
name: Gibbons, L.
name: Gray, S. W.
name: Hartill, D. L.
name: Kreinick, D. L.
name: Kuznetsov, V. E.
name: Patterson, J. R.
name: Peterson, D.
name: Riley, D.
name: Ryd, A.
name: Sadoff, A. J.
name: Shi, X.
name: Sun, W. M.
name: Yelton, J.
name: Rubin, P.
name: Lowrey, N.
name: Mehrabyan, S.
name: Selen, M.
name: Wiss, J.
name: Libby, J.
name: Kornicer, M.
name: Mitchell, R. E.
name: Besson, D.
name: Pedlar, T. K.
name: Cronin-Hennessy, D.
name: Hietala, J.
name: Dobbs, S.
name: Metreveli, Z.
name: Seth, K. K.
name: Tomaradze, A.
name: Xiao, T.
name: Johnson, D.
name: Malde, S.
name: Martin, L.
name: Powell, A.
name: Wilkinson, G.
name: Asner, D. M.
name: Tatishvili, G.
name: Ge, J. Y.
name: Miller, D. H.
name: Shipsey, I. P. J.
name: Xin, B.
name: Adams, G. S.
name: Napolitano, J.
name: Ecklund, K. M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: The first measurements of the coherence factor R_{K_S^0Kπ} and the average strong--phase difference δ^{K_S^0Kπ} in D^0 \to K_S^0 K^\mpπ^\pm decays are reported. These parameters can be used to improve the determination of the unitary triangle angle γ in B^- \rightarrow $\widetilde{D}K^-$ decays, where $\widetilde{D}$ is either a D^0 or a D^0-bar meson decaying to the same final state, and also in studies of charm mixing. The measurements of the coherence factor and strong-phase difference are made using quantum-correlated, fully-reconstructed D^0D^0-bar pairs produced in e^+e^- collisions at the ψ(3770) resonance. The measured values are R_{K_S^0Kπ} = 0.70 \pm 0.08 and δ^{K_S^0Kπ} = (0.1 \pm 15.7)$^\circ$ for an unrestricted kinematic region and R_{K*K} = 0.94 \pm 0.12 and δ^{K*K} = (-16.6 \pm 18.4)$^\circ$ for a region where the combined K_S^0 π^\pm invariant mass is within 100 MeV/c^2 of the K^{*}(892)^\pm mass. These results indicate a significant level of coherence in the decay. In addition, isobar models are presented for the two decays, which show the dominance of the K^*(892)^\pm resonance. The branching ratio {B}(D^0 \rightarrow K_S^0K^+π^-)/{B}(D^0 \rightarrow K_S^0K^-π^+) is determined to be 0.592 \pm 0.044 (stat.) \pm 0.018 (syst.), which is more precise than previous measurements.
description: 38 pages. Version 3 updated to include the erratum information. Errors corrected in Eqs (25), (26), 28). Fit results updated accordingly, and external inputs updated to latest best known values. Typo corrected in Eq(3)- no other consequences