Search for a Lifetime Difference in D⁰ Decays

2001/09/07 by B. Aubert, Aubert, B.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #hep-ex

paper · pdf · doi:10.48550/arxiv.hep-ex/0109008

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

arxiv created 2001/09/07 · arxiv updated 2009/11/30

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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