Research of new models of elementary particles in B meson physics and neutrino physics

基于B衰变的微扰QCD处理，我们对B→π、ρ、D和D^*形式因子进行了理论计算。所得结果与最近在b工厂得到的实验数据吻合较好。它在低动量传递区域表现良好，并补充了基于晶格QCD的类似理论计算在高动量传递区域表现良好。我们将分析扩展到非轻子B→D_3π衰变。利用B→D_3π分支比的实验数据和我们的理论计算，证明了可以得到Kobayashi-Maskawa矩阵元素|V_<ub>|。我们的分析现在已经扩展到其他非轻子B衰变。我们分析了基本粒子的左右对称模型，看看CP违背是否可能与标准模型预测有较大偏差。我们已经证明，即使使用重的（1-10 TeV） W_R规范玻色子，我们也可以预期大的CP违逆。左右对称模型包含右手中微子（ν_R），这对于解释实际的中微子质量和振荡是必不可少的。利用本研究获得的夸克风味混合矩阵约束条件，我们可以进一步研究轻子风味混合矩阵的结构，从而对中微子振荡有新的认识。

We have made theoretical calculations of B → π, ρ, D and D^* form factors based on the perturbative QCD treatment of B decays. The results nicely agree with the experimental data recently obtained at B-factories. It is good at low momentum transfer regions, and complements the similar theoretical calculations based on lattice QCD which are good at high momentum transfer regions.We have extended our analysis to non-leptonic B → D_3π decay. It has been shown that the Kobayashi-Maskawa matrix elements |V_<ub>| can be obtained with the experimental data of B → D_3π branching ratio and our theoretical calculation. Our analysis has now been extending to other nonleptonic B decays.We have analyzed left-right symmetric model of elementary particles to see if large deviation of CP violation from the standard model prediction is possible or not. It has been shown that we can expect large CP violation even with heavy (1-10 TeV) W_R gauge boson. The left-right symmetric model contains right-handed neutrino (ν_R) which is indispensable to account for realistic neutrino mass and oscillations. With the constraints on quark flavor mixing matrix obtained in our work we can further investigate the structure of lepton flavor mixing matrix, which will lead to new insight in neutrino oscillation.