This study measures direct CP violation in B meson decays. Previous work suggested a difference in the decay of charged and neutral particles, but the large uncertainties on these measurements made it difficult to say whether the difference was real. This study reduces the uncertainty on the charged particle decay rate asymmetry by a factor of 1.7. Although firm conclusions cannot be drawn from this result, the measurement provides stronger evidence for a large deviation in direct CP violation between charged and neutral B-meson decays and possible new sources of CP violation beyond the standard model.
- S.-W. Lin
- Y. Unno
- A. Zupanc
