[en] Five different methods for searches of mixing and CP violation in the D0 - D(bar sign)0 system are presented and different experimental result are shown. The results are consistent with no mixing and no CP violation

[en] Four different methods for searches of mixing and CP violation in the D⁰-D-bar ⁰ system are presented. For each of them the experimental result with currently best sensitivity to mixing parameters is shown. The results are consistent with no mixing and no CP violation. A proposal for future D⁰ mixing search with coherent D⁰D-bar ⁰ pairs is described

[en] Recent measurements of D⁰-D-bar⁰ mixing parameters and measurements searching for CP violation in D⁰ decays are presented.

[en] Motivated by the first experimental evidence of meson oscillations in the D system, we study D⁰-D-bar⁰ mixing in the Littlest Higgs model with T-parity. We investigate its role in constraining the model parameters and its impact on the most interesting flavour observables. We find that the experimental data are potentially strongly constraining but at present limited by large theoretical uncertainties in the long-distance Standard Model contribution to D⁰-D-bar⁰ mixing

[en] We analyze ΔC=2 transitions in the framework of a minimal extension of the standard model where either a Q=2/3 or a Q=-1/3 isosinglet quark is added to the standard quark spectrum. In the case of a Q=2/3 isosinglet quark, it is shown that there is a significant region of parameter space where D⁰-bar D⁰ mixing is sufficiently enhanced to be observed at the next round of experiments. On the contrary, in the case of a Q=-1/3 isosinglet quark, it is pointed out that obtaining a substantial enhancement of D⁰-bar D⁰ mixing, while complying with the experimental constraints on rare kaon decays, requires a contrived choice of parameters

[en] It is pointed out that the internal structure of the narrow resonance X(3872) at the D⁰D-bar*⁰ threshold can be studied in some detail by measuring the rate and the spectra in the decays X(3872)→D⁰D-bar⁰π⁰ and X(3872)→D⁰D-bar⁰γ. In particular, if this resonance contains a dominant 'molecular' component DD*-bar±D-barD*, this component can be revealed and studied by a distinct pattern of interference between the underlying decays of D*⁰ and D-bar*⁰ whose coherence is ensured by fixed (but yet unknown) C parity of the X(3872)

[en] We discuss the impact of matter effects in the D⁰-ovr D⁰ system. We show that such effects could, in principle, be measured, but that they cannot be used to probe the mass difference x_D or the lifetime difference y_D. This occurs because the mixing effects and the matter effects decouple at short times. We also comment briefly on the B systems

[en] Using 2.7 fb^-1 of data taken with the CLEO II detector, we have searched for CP violation in the charm system. We looked for asymmetries in the number of decays of D⁰'s and bar D⁰'s to the CP eigenstates K⁺K^-, K_S⁰φ, and K_S⁰π⁰. Confidence intervals (90%) on these asymmetries were found to be -0.020< A_KK<0.180, -0.182< A_KS⁰φ<0.126, and -0.067< A_KS⁰π⁰<0.031, respectively

[en] Based on a dataset acquired by the BABAR experiment running on and near the Υ(4S) resonance from 1999-2002, an upper limit is set on the rate of D⁰-(bar D)⁰ mixing using the decay mode D*⁺ → D⁰π⁺, followed by a semi-leptonic decay of the D⁰. Results are compared to previous BABAR analysis using hadronic decays. We also set limits on the flavor-changing neutral current decays D⁰ → e⁺e^- (μ⁺μ^-) and the lepton-flavor violation decays D⁰ → e^±μ^±

[en] If the true values of the D⁰--Anti-D⁰ mixing parameters lie within the one sigma ranges of recent measurements, then there is strong evidence for a large width difference, y approximately > 0.01, and large SU(3) breaking effects in strong phases, delta approximately > pi/4. These constraints are model independent, and would become stronger if vert_barM₁₂/Gamma₁₂vert_bar << 1 in the D⁰--Anti-D⁰ system. The interesting fact that the FOCUS result cannot be explained by a large mass difference is not trivial and depends on the small D⁰/Anti-D⁰ production symmetry in FOCUS and the bounds on CP violating effects from CLEO. The large value of delta might help explain why y approximately sin²Theta_c