Tc-2 Model, The New Physical Effect On The Decay B ¡ú ¦Ð¦Ð, The Formula For ¦Ðk, Kk

Recently, with the push of B factories and other related big experiments, the search of the signatures of New Physics is already an important part of B physics, which lay a foundation for the theoretical research of this field, in this paper, we will study the effects of New Physics of the two-body hadronic decays B â†'ππ,Ï€K, KK in the framework of TC-2 model, and we find some interesting results.In the first three chapters, we made a review for the theoretical framework of Standard Model and B physics. We presented the extraction of Wilson coefficients; Meanwhile we give a brief description of several methods of calculating the hadron matrix elements, and discussed the QCD factorization in details especially. And at last, we presented the theoretical formulae for the branching ratio of two-body decays B â†' PP. In the third chapter, we gave a brief introduction of TC-2 models, found currently available experimental constraints on TC-2 models. After the calculation of the Wilson coefficients in SM and TC-2 models respectively, we find that the TC-2 corrections to the Wilson coefficients C_3,4,5,6 are very small, but as for C_7,8,9,10 and C_r,g, the contributions can be rather large. In the fourth chapter, we calculate the branching ratios of B â†'ππ, Ï€K, KK in SM and TC-2 models, we also made some phenomenal analysis with well-measured branching ratio and sizable yields, we found that,(1) For those tree-dominated decays, the New Physics contributions in TC-2 models are very small. But for decays whose tree contribution are CKM suppressed, the New Physics contributions can be rather large.(2) For those penguin-dominated decays, the New Physics contributions in TC-2 models are significant, up to 120%.(3) For the four B â†' KÏ€ decays, the New Physics contributions to their branching ratios play an important rule to improve the consistency of the theoretical predictions with the data.