Time-dependent amplitude analysis of B0 -> KS0π+π-

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Gershon, T. J. ; Harrison, P. F. ; Ilić, Jelena ; Latham, Thomas ; Mohanty, G. B. ; Puccio, E. M. T. ; HASH(0x561a136cada0) (2009)

We perform a time-dependent amplitude analysis of B-0 -> K-S(0)pi(+)pi(-) decays to extract the CP violation parameters of f(0)(980)K-S(0) and rho(0)(770)K-S(0) and the direct CP asymmetry of K*+(892)pi(-). The results are obtained from a data sample of (383 +/- 3)x10(6) BB decays, collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. We find two solutions, with an equivalent goodness-of-fit. Including systematic and Dalitz plot model uncertainties, the combined confidence interval for values of the CP parameter beta(eff) in B-0 decays to f(0)(980)K-S(0) is 18 degrees <beta(eff)< 76 degrees at 95% confidence level (C.L). CP conservation in B-0 decays to f(0)(980)K-S(0) is excluded at 3.5 standard deviations including systematic uncertainties. For B-0 decays to rho(0)(770)K-S(0), the combined confidence interval is -9 degrees <beta(eff)< 57 degrees at 95% C.L. In decays to K*+(892)pi(-) we measure the direct CP asymmetry to be A(CP)=-0.20 +/- 0.10 +/- 0.01 +/- 0.02. The measured phase difference (including (BB0)-B-0 mixing) between decay amplitudes of B-0 -> K*+(892)pi(-) and B-0 -> K*-(892)pi(+), excludes the interval -137 degrees <Delta Phi(K*+(892)pi(-))<-5 degrees at 95% C.L.
  • References (49)
    49 references, page 1 of 5

    35 ) 30 s p 25 1 .

    /(1 20 s tag 15 FIG. 17: Distributions of Δt when the Bt0ag is a B0 (top), B0 (middle), and the derived Δt asymmetry (bottom) for events in the J/ψ KS0 region. The solid line is the total PDF and the points with error bars represent data.

    [1] N. Cabibbo, Phys. Rev. Lett. 10, 531 (1963).

    [2] M. Kobayashi and T. Maskawa, Prog. Theor. Phys. 49, 652 (1973).

    [3] E. Barberio et al. (Heavy Flavor Averaging Group - HFAG) (2008), arXiv:0808.1297 [hep-ex].

    [4] Y. Grossman, Z. Ligeti, Y. Nir, and H. Quinn, Phys. Rev. D68, 015004 (2003).

    [5] M. Gronau, Y. Grossman, and J. L. Rosner, Phys. Lett. B579, 331 (2004).

    [6] M. Gronau, J. L. Rosner, and J. Zupan, Phys. Lett. B596, 107 (2004).

    [7] H.-Y. Cheng, C.-K. Chua, and A. Soni, Phys. Rev. D72, 014006 (2005).

    [8] M. Gronau and J. L. Rosner, Phys. Rev. D71, 074019 (2005).

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