Research Papers in Physics and Astronomy


Date of this Version

May 2002


Published by American Physical Society. Phys. Rev. Lett. 89, 281801 (2002). Copyright © 2002 American Physical Society. Permission to use.


We present an improved measurement of b-meson lifetimes using fully reconstructed B-decays produced in pp̅ collisions at √s =1.8 TeV, using 114 pb-1 of data collected at the Collider Detector at Fermilab. We obtain τ (B+)=1.636±0.058(stat) ±0.025(syst) ps, τ (B0)=1.497±0.073(stat) ±0.032(syst) ps and for the lifetime ratio τ (B+)/(B0)=1.093±0.066(stat) ±0.028(syst).

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