Results of time evolution analyses of B-decays at Belle

We report results of proper-time evolution analyses of B decays at Belle, based on a 29.1 fb − 1 data sample recorded at the Υ(4 S ) resonance. These results include measurements of sin 2 φ 1 , the lifetime of B -mesons, and the mass-difference between two mass eigenstates of the B 0 - ¯ B 0 system (∆ m d ). ∆ m d is measured using three different methods: fully reconstructed hadronic modes, a fully reconstructed semi-leptonic mode, and a partially reconstructed D ∗± π ∓ mode.