Search for D^0 - barD^0 Mixing in the Dalitz Plot Analysis of D^0 --> K_S^0 pi^+ pi^-

Abstract

The resonant substructure in D0 --> K0S pi+ pi- decays is described by a combination of ten quasi two-body intermediate states which include both CP-even and CP-odd eigenstates and one doubly-Cabibbo suppressed channel. We present a formalism that connects the variation in D0 decay time over the Dalitz plot with the mixing parameters, x and y, that describe off-shell and on-shell D0-D0B mixing. We analyze the CLEO II.V data sample and find the parameters x and y are consistent with zero. We limit (-4.7 < x < 8.6)% and (-6.1 < y < 3.5)% at the 95\% confidence level

11 pages postscript,also available through http://www.lns.cornell.edu/public/CLNS/2005/, Includes correction to formalism which mostly impacts results that allow CP violation. Analysis of data reprocessed and the fit results and plots updated.

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• Limits on D0-D0bar Mixing and CP Violation from the Ratio of Lifetimes for Decay to K-pi+, K-K+, and pi-pi+
• Search for CP Violation in D^0--> K_S^0 pi^+pi^-
• Search for D0-D0bar Mixing Using Semileptonic Decay Modes
• Measurement of Charm Meson Lifetimes
• Search for D^0-D^0bar mixing in D^0 -> K+pi- decays and measurement of the doubly-Cabibbo-suppressed decay rate

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