부산대학교 도서관

We implement the χ 2 fit for R (K (∗)) with possible tree-level new physics in a model-independent parametrization. Relevant Wilson coefficients are decomposed into the new physics scale, its power, and the fermionic couplings. Constraints from the branching ratio of B s → μ + μ − can be naturally incorporated with the scheme. For a reasonable set of the parameter ranges it is found that the new physics is less than ∼ 5 TeV. Some new physics models including the leptoquark, Z ′ , etc. can be embraced within our framework. We give comments on new LHCb data which are close to the standard model predictions. [ABSTRACT FROM AUTHOR]