Abstract
We study the decay using a sample of events collected with the BABAR detector at the PEP-II factory. We perform a Gronau-London-Wyler analysis where the meson decays into either a -even () eigenstate (, ), -odd () eigenstate (, , ) or a non- state (). We also analyze meson decays into from a Cabibbo-favored decay or doubly suppressed decay [Atwood-Dunietz-Soni (ADS) analysis]. We measure observables that are sensitive to the Cabibbo-Kobayashi-Maskawa angle : the partial-rate charge asymmetries , the ratios of the -decay branching fractions in and non- decay, the ratio of the charge-averaged branching fractions, and the charge asymmetry of the ADS decays: , , , , , and , where the first uncertainty is statistical and the second is systematic. Combining all the measurements and using a frequentist approach yields the magnitude of the ratio between the Cabibbo-suppressed and favored amplitudes, with a one (two) sigma confidence level interval of [0.24, 0.38] ([0.17, 0.43]). The value is excluded at the 3.3 sigma level. A similar analysis excludes values of in the intervals [0, 7]°, [55, 111]°, and [175, 180]° ([85, 99]°) at the one (two) sigma confidence level.
1 More- Received 23 September 2009
DOI:https://doi.org/10.1103/PhysRevD.80.092001
©2009 American Physical Society