Precise Measurement of B Meson Lifetimes with Hadronic Decay Final States
Abstract
The lifetimes of the B0bar and B- mesons are extracted from 29.1/fb of data collected with the Belle detector at the KEK B-factory. A fit to the decay length differences of neutral and charged B meson pairs, measured in events where one of the B mesons is fully reconstructed in several hadronic modes, yields tauB0bar = 1.554 +/- 0.030(stat) +/- 0.019(syst) ps, tauB- = 1.695 +/- 0.026(stat) +/- 0.015(syst) ps, and tauB-/tauB0bar = 1.091 +/- 0.023(stat) +/- 0.014(syst).
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