Possibility of extracting the weak phase $e???$ from $e???_{b}a?’ e??? D^{0}$ decays

摘要

We explore the possiblity of extracting the weak phase $e???$ from pure tree decays $e???_{b}a?’ e??? (D^{0},overline{D}^{0},D^{0}_{ ext{CP}})$ in a model independent way. We find the CP violating phase $e???$ can be determined cleanly without any hadronic uncertainties. Furthermore, these decays are free from the penguin pollution and neither tagging nor time dependent studies are required for the extraction.