Time-dependent amplitude analysis of B[superscript 0] → K[superscript 0][subscript S] π[superscript +]π[superscript -]
Name
PhysRevD.80.112001.pdf
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Author(s)
Dujmic, Denis
Cowan, Ray F
Fisher, Peter H
Henderson, Shawn Wesley
Sciolla, Gabriella
Spitznagel, Michael A
Date Issued
December 2009
Journal
Physical Review D
Publisher
American Physical Society (APS)
Citation
Aubert, B., Y. Karyotakis, J. P. Lees, V. Poireau, E. Prencipe, X. Prudent, V. Tisserand, et al. “Time-Dependent Amplitude Analysis of B[superscript 0]→K[superscript 0][subscript S]π[superscript +]π[superscript −].” Physical Review D 80, no. 11 (December 2, 2009). © 2009 American Physical Society
Version
Final published version
Abstract
We perform a time-dependent amplitude analysis of B[superscript 0]→K[superscript 0][subscript S]π[superscript +]π[superscript -] decays to extract the CP violation parameters of f[subscript 0](980)K[superscript 0][subscript S] and ρ[superscript 0](770)K[superscript 0][subscript S] and the direct CP asymmetry of K*[superscript +](892)π[superscript -]. The results are obtained from a data sample of (383±3)×10[superscript 6] BB̄ 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 β[subscript eff] in B[superscript 0] decays to f[subscript 0](980)K[superscript 0][subscript S] is 18° < β[subscript eff] < 76° at 95% confidence level (C.L). CP conservation in B[superscript 0] decays to f[subscript 0](980)K[superscript 0][subscript S] is excluded at 3.5 standard deviations including systematic uncertainties. For B[superscript 0] decays to ρ[superscript 0](770)K[superscript 0][subscript S], the combined confidence interval is -9° < β[subscript eff]< 57° at 95% C.L. In decays to K*[superscript +](892)π[superscript -] we measure the direct CP asymmetry to be A[subscript CP]=-0.20±0.10±0. 01±0.02. The measured phase difference (including B[superscript 0]B̄[superscript 0] mixing) between decay amplitudes of B[superscript 0]→K*[superscript +](892)π[superscript -] and B̄[superscript 0]→K *[superscript -](892)π[superscript +], excludes the interval -137° < ΔΦ(K*[superscritp +](892) π[superscript -]) < -5° at 95% C.L. © 2009 The American Physical Society.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.80.112001
