Search for a Lifetime Difference in D0 Decays [report]

B Aubert
2004 unpublished
The D 0 mixing parameter y = ∆Γ/2Γ was determined by measuring the D 0 lifetime separately for the K − π + 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 0 π + decay and particle identification. The following preliminary result was obtained: y = (−1.0 ± 2.2(stat) ± 1.7(syst)) % .
doi:10.2172/826711 fatcat:k6nhjcfzpvchviewyo5fz7jvym