Abstract
We report measurements of branching fractions for the decays , where are the pseudoscalar charmless mesons , , and , based on of data collected with the BABAR detector, using and mesons found in the recoil of a second meson decaying as . Assuming isospin symmetry, we combine pionic branching fractions to obtain ; we find evidence of the decay and measure its branching fraction to be , and determine to 90% confidence level. Using partial branching fractions for the pionic decays in ranges of the momentum transfer and a variety of form factor calculation, we obtain values of the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element in ranging from to .
- Received 15 May 2008
DOI:https://doi.org/10.1103/PhysRevLett.101.081801
©2008 American Physical Society