Branching ratio and CP violation of B c→ DK decays in the perturbative QCD approach.

In this paper, we calculate the branching ratio and direct CP asymmetry parameter of B→ D⁰ K^± in the framework of a perturbative QCD approach based on k _T factorization. Besides the usual factorizable diagrams, both nonfactorizable and annihilation type contributions are taken into account. We find that (a) the branching ratio is at the order of 10⁻⁵; (b) the tree annihilation diagrams and the penguin diagrams dominate the total contribution; and (c) the direct CP asymmetry is about 7%, which can be tested in the Large Hadron Collider beauty experiments (LHC-b) at CERN. [ABSTRACT FROM AUTHOR]