Abstract
We observe evidence for mixing by measuring the difference in the apparent lifetime when a meson decays to the eigenstates and and when it decays to the final state . We find the relative difference of the lifetimes to be , 3.2 standard deviations from zero. We also search for a asymmetry between and decays; no evidence for violation is found. These results are based on of data recorded by the Belle detector at the KEKB collider.
- Received 31 March 2007
DOI:https://doi.org/10.1103/PhysRevLett.98.211803
©2007 American Physical Society