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 < 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 < 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

Time-dependent amplitude analysis of B-0 -> K-S(0)pi(+)pi(-)

Baracchini E;Ferroni F;
2009

Abstract

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 < 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 < 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
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12571/1391
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