Charm Mixing and Lifetimes at Babar

Details Charm Mixing and Lifetimes at Babar Charm Mixing and Lifetimes at Babar

2002-05-21

arxiv.org/abs/hep-ex/0205071v1

Physics

High Energy Physics

High Energy Physics - Experiment

5 pages, 2 figures; proceedings of the XXXVII Rencontres de Moriond on Electroweak Interactions and Unified Theories, Les Arcs

Scientific paper

Preliminary limits on the D^0 mixing parameter y = \Delta \Gamma / 2 \Gamma are obtained using about 57.8 fb^-1 of data collected by BaBar in 2000 and 2001:y = (1.4 \pm 1.0 (stat.) +0.6 -0.7 (syst.))%. y is extracted, provided that CP is conserved, by measuring separately the D^0 lifetime for the Cabibbo-suppressed decay modes K- K+, \pi- \pi+ and the Cabibbo-favoured mode K- \pi+. Backgrounds are suppressed by D*-tag and particle identification requirements.

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