D0-Anti-D0 Mixing Results From BaBar By Analysis of D0 ---> K+ Pi- Pi0 Dalitz-Plot Regions

We present a preliminary search for D0-(bar D)0 mixing using the decays D0 → K+π-π0, additionally presenting Dalitz-plot distributions and a measurement of the branching ratio for this mode. A new tagging technique is used to produce the doubly Cabibbo-suppressed Dalitz plot, which in turn is used to motivate the method used for the D-mixing search. We analyze 230.4 fb-1 of data collected from the BABAR detector at the PEP-II collider. Assuming CP conservation, we find RM < 0.054% with 95% confidence, and we estimate that the data are consistent with no mixing at a 4.5% confidence level. We present D-mixing results both with and without the assumption of CP conservation