Search for a Lifetime Difference in D^0 Decays

Details Search for a Lifetime Difference in D^0 Decays Search for a Lifetime Difference in D^0 Decays

2001-09-07

arxiv.org/abs/hep-ex/0109008v1

Physics

High Energy Physics

High Energy Physics - Experiment

14 pages, 3 figures, contributed paper to the 9th Heavy Flavor Symposium

Scientific paper

The D^0 mixing parameter y = Delta Gamma/2 Gamma was determined by measuring the D^0 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^* --> D^0pi^+ decay and particle identification. The following preliminary result was obtained: y = (-1.0 +/- 2.2 (stat) +/- 1.7 (syst))%.

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