$D^0 - \overline{D^0}$ Mixing and D0→K-π+π0 Resonant Substructure Results from CLEO

Abstract

The CLEO Collaboration has an active charm physics effort underway using 14fb-1 of CLEO II and CLEO II.V data. A recent analysis of the time dependence of the 'wrong-sign' decay D0→K+ π- has placed limits on x′ and y′, the amplitudes that describe mixing in the D0 system. The 95% CL limits, with no assumptions about CP violation, are (1/2)x′2 < 0.041% and -5.8% < y′ < 1.0%. Measurements of D0 decay rates to CP eigenstates, D0→K- K+ and D0→π-π+, provide preliminary CP asymmetry measurements [Formula: see text] and [Formula: see text]. A third analysis provides the first preliminary evidence for the decay D0→K+π- π0. Finally, a new Dalitz analysis of the decay D0→K-π+ π0 gives preliminary evidence for several new resonance contributions in this decay and also requires the presence of a significant non-resonant component.