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We analyze the lepton-universality violating $B\to K^{(*)}\ell^+\ell^-$puzzle $R(K^{(*)})$ in a model-independent way. The branching ratio ${\rmBr}(B_s\to\mu^+\mu^-)$ is also considered as a main constraint. We show how thebranching ratio restricts the allowed region of the parameter space, andinvestigate new physics effects on the electronic as well as muonic sector in$R(K^{(*)})$. Within a reasonable range of parameters we find that the newphysics scale goes up to $\sim 5$ TeV, and the new physics effects on theWilson coefficient is $-1\lesssim C_{9NP}^\mu\lesssim 0$.

Model-independent analysis on $R(K^{(*)})$