Dual Higgs Model With The B Meson Radiative Decay

Since 1995, by the promotion of B factory and other large B experiments, the study of B meson decays and CP violation have become one of the hot topics of the international particle physics research. It is an important object of B meson experiment to look for the signal and evidence of new physics. In the framework of the standard model(SM), the two-Higgs-doublet model(2HDM), we made a systematic study of the exclusive radiative decays B - V, we focus on the calculation of the new physics corrections to such processes, and found some interesting results.In first three chapters, we made a review of the theoretical framework of B physics in the SM and 2HDM's. We presented the extraction of Wilson coefficients, the evolvement of the renormalization group and the definition and current experimental progress of CP violation of B meson. We listed the basic formulas needed in calculation and made a brief discussion of the current and near future B meson experiments. We also gave a brief description of several methods of calculating the hadron matrix elements, and discussed the QCD factorization in details.In chapter three, we made a brief review about the basic structure of the general two-Higgs-doublet models, found currently available experimental constraints on 2HDM's: the models I, II and III.In chapter four (our own work), in the framework of SM and 2HDM, we calculated the new physics corrections on the branching ratios, CP asymmetries, isospin and U-spin symmetry breaking of the decays B - V (V = K*, ), induced by the charged Higgs penguins in the general two-Higgs-doublet models. Within the considered parameter space, we found that:1. The new physics corrections to the observables are generally small in the model I ,II and model III- A, but large in model III-B;2. Prom the well measured branching ratios, a lower bound of MH > 200 GeV in model II was obtained, while the allowed range of MH in model III-B is 226 MH 293 GeV; these bounds are comparable with those from the inclusive B - XS decay;3. The NLO Wilson coefficient C7(mb) in model III-B is positive and disfavored by the measured value of isospin symmetry breaking (K* ) = (3.9 4.8)%, but still can not be excluded if we take the large errors into account; The CP asymmetry ACP(B - ) in model III-B has an opposite sign with the one in the standard model (SM), which may be used as a good observable to distinguish the SM frommodel III-B. The isospin symmetry breaking ( ) is less than 10% in the region of 40 70 preferred by the global fit result, The SM and model III-B predictions for are opposite in sign for small or large values of the CKM angles.In last chapter,a short summary of this paper and some remarks on future developments of B physics in forthcoming years is given.