Nonleptonic two-body decays of $D$ Mesons and $CP$ violation.

Santorelli P.
  Martedì 12/09   09:00 - 13:00   Aula A208   I - Fisica nucleare e subnucleare
The nonleptonic two-body decays of the $D$ and $D_{s}$ mesons represent a laboratory to study possible effects of $CP$ violation. The attention for these decay modes was triggered four years ago by the results of measurements of the difference between $CP$ asymmetries in charged $KK$ and $\pi\pi$ final states, $\Delta a_{CP}$. Although the measured $\Delta a_{CP}$ is now compatible with zero, the nonleptonic decays of charmed mesons into a pair of light mesons is an interesting subject for many reasons. We will discuss these reasons and present models to study the decays into two pseudoscalar mesons.