Possibility of extracting the weak phase 7 from Λ_b→ Λ0 decays

摘要

We explore the possibility of extracting the weak phase γ from pure tree decays Λ_b→ Λ(ie687_01) 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.