Charm Mixing and Lifetimes at Babar
Alexis Pompili
Abstract
Preliminary limits on the D0 mixing parameter y = ΔΓ/ 2 Γare obtained using about 57.8 fb-1 of data collected by BaBar in 2000 and 2001:y = (1.4 1.0 (stat.) +0.6 -0.7 (syst.))%. y is extracted, provided that CP is conserved, by measuring separately the D0 lifetime for the Cabibbo-suppressed decay modes K- K+, π- π+ and the Cabibbo-favoured mode K- π+. Backgrounds are suppressed by D*-tag and particle identification requirements.
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