Searches for CP violation in charm decays at BABAR

Abstract

In the Standard Model \CP violation in charm decays is expected to be very small, at the level of 0.1% or less. A significant excess of \CP violation with respect to the Standard Model predictions would be a signature of new physics. We report on recent searches for \CP violation in charm meson decays at \babar, using a data sample corresponding to an integrated luminosity of about 470 \invfb. In particular, we report on searches for \CPV in the 3-body $\Dp\to\Kp\Km\pip$ decay and for decay modes with a \KS in the final state, such as $\Dp\to\KS\Kp$, $\Ds\to\KS\Kp$, $\Ds\to\KS\pip$. A lifetime ratio analysis of $\Dz\to\Kp\Km, \pip\pim$ with respect to $\Dz\to\Km\pip$ decays, which is sensitive to \Dz-\Dzb mixing and \CP violation, is also presented here.