Possibility of extracting the weak phase γ from Λ_b → ΛD~0 decays

摘要

We explore the possibility of extracting the weak phase γ from pure tree decays Λ_b → Λ(D~0, D~0, D_(CP)~0) in a model independent way. We find the CP violating phase γ 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.