Regular Article - Theoretical Physics
Effective lifetimes of B s decays and their constraints on the – mixing parameters
Nikhef, Science Park 105, 1098 XG, Amsterdam, The Netherlands
* e-mail: Robert.Fleischer@nikhef.nl
Published online: 3 November 2011
Measurements of the effective lifetimes of B s -meson decays, which only require untagged rate analyses, allow us to probe the width difference ΔΓ s and the CP-violating phase ϕ s of – mixing. We point out that the dependence of the effective lifetime on non-linear terms in ΔΓ s allows for a determination of ϕ s and ΔΓ s given a pair of B s decays into CP-even and CP-odd final states. Using recent lifetime measurements of and decays, we illustrate this method and show how it complements the constraints in the ϕ s –ΔΓ s plane from other observables.
© Springer-Verlag / Società Italiana di Fisica, 2011