Model-Independent Analysis ofB-\barBMixing andCPViolation inBDecays

We present a framework to analyze effects of new physics beyond the standard model on B-B̄ mixing and CP violation in B decays in a model-independent manner. Assuming that tree level decay amplitudes are dominated by the standard model ones, new physics contribution to the B-B̄ mixing can be extracted from several measurements at B factories. Using this framework, we show the present constraint on new physics contribution to the B-B̄ mixing, and illustrate constraints expected to be given by future experiments at B factories. We also point out a possibility that CP asymmetries in B → ψKS , B → ππ, and B → DK modes look consistent with the standard model, even if a large new physics contribution is present in the B-B̄ mixing. 12.90.+b, 13.25.Hw, 14.40.Nd Typeset using REVTEX