Interpreting experimental bounds onD0−D0¯mixing in the presence ofCPviolation

We analyze the most recent experimental data regarding $D^0-\overline{D^0}$ mixing, allowing for $\mathrm{CP}$ violation. We focus on the dispersive part of the mixing amplitude, $M_{12}^D,$ which is sensitive to new physics contributions. We obtain a constraint on the mixing amplitude: $|M_{12}^D|<~6.2\times {10}^{-11}\mathrm{MeV}$ at 95% C.L. This constraint is weaker by a factor of about three than the one which is obtained when no $\mathrm{CP}$ violation is assumed.