CP VIOLATION IN B → CCD DECAYS AT BELLE

摘要

We report a measurement of the CP violation parameters in b → ccd decays. Mixing-induced CP violation involving this transition is studied using a sample of B~0 → J/ψπ~0, D~(*+)D~(*-) and D~(*±)D~(-+) decays with a data set accumulated at the Υ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e~+e~- collider. CP violation parameters are extracted from a fit to the distributions of time intervals between two B~0 meson decay vertexes.