Abstract
We report a study of the decay using a data sample corresponding to of integrated luminosity collected by the D0 experiment in 2002–2006 during run II of the Fermilab Tevatron collider. One meson was partially reconstructed in the decay , and the other meson was identified using the decay where no attempt was made to distinguish and states. For the branching fraction we obtain a 90% C.L. range and central value . This was subsequently used to make the most precise estimate of the width difference in the system: .
- Received 1 March 2007
DOI:https://doi.org/10.1103/PhysRevLett.99.241801
©2007 American Physical Society