Search for a Lifetime Difference in D0 Decays
Abstract
The D0 mixing parameter y = Delta Gamma/2 Gamma was determined by measuring the D0 lifetime separately for the K-pi+ decay mode and the K-K+ decay mode with 12.4 fb-1 of data collected by the BABAR experiment in 2001. Backgrounds were suppressed with the D* --> D0pi+ decay and particle identification. The following preliminary result was obtained: y = (-1.0 +/- 2.2 (stat) +/- 1.7 (syst))%.
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