Analysis of direct CP violation in $B^- \to D^0 D_s^-, D^0 D^-$ decays

Details Analysis of direct CP violation in $B^- \to D^0 D_s^-, D^0 D^-$ decays Analysis of direct CP violation in $B^- \to D^0 D_s^-, D^0 D^-$ decays

2001-05-02

arxiv.org/abs/hep-ph/0105012v1

Eur.Phys.J.C22:115-121,2001

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex, 14 pages

Scientific paper

10.1007/s100520100774

We investigate the possibility of observing the direct CP violation in the decay modes $B^- \to D^0 D_s^-$ and $D^0 D^-$ within the Standard Model. Including the contributions arising from the tree, annihilation, QCD as well as electroweak penguins with both time- and space-like components, we find that the direct CP asymmetry in $B^- \to D^0 D_s^-$ is very small $\sim 0.2$ % but in $B^- \to D^0 D^- $ decay it can be as large as 4%. Approximately $10^7$ charged $B$ mesons are required to experimentally observe the CP asymmetry parameter for the later case. Since this is easily accessible with the currently running B factories, the decay mode $B^- \to D^0 D^-$ may be pursued to look for CP violation.

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