Theoretical status of Bs-mixing and lifetimes of heavy hadrons

We review the theoretical status of the lifetime ratios τB+/τBd , τBs/τBd , τΛb/τBd and τBc and of the mixing quantities ∆Ms, ∆Γs and φs. ∆Ms and ∆Γs suffer from large uncertainties due to the badly known decay constants, while the ratio ∆Γs/∆Ms can be determined with almost no non-perturbative uncertainties, therefore it can be used perfectly to find possible new physics contributions in the mixing parameters. We suggest a very clear method of visualizing the bounds on new physics and demonstrate this by combining the latest experimental numbers on the mixing quantities quantities with theory one already gets some hints for new physics contributions, but more precise experimental numbers are needed to draw some definite conclusions. We conclude with a ranking list of all the discussed quantities according to their current theoretical uncertainties and point out possible improvements.