摘要: We briefly summarize the results of neutrino mixing in SO(10). This is a prototype of a grand unified theory which utilizes spontaneous symmetry breaking with Higgs scalars. Then, we combine grand unified symmetry with extended te... 展开 We briefly summarize the results of neutrino mixing in SO(10). This is a prototype of a grand unified theory which utilizes spontaneous symmetry breaking with Higgs scalars. Then, we combine grand unified symmetry with extended technicolor symmetry and obtain neutrino mixing in the framework of dynamical symmetry breaking without Higgs scalars. Finally, we discuss gauge boson masses and neutrino mixing with scalars in an 0(4) x U(1) gauge model. (ERA citation 08:052724) 收起