Electroweak symmetry breaking and mass spectra in six-dimensional gauge–Higgs grand unification
Yutaka Hosotani (Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan); Naoki Yamatsu (Maskawa Institute for Science and Culture, Kyoto Sangyo University, Kyoto 603-8555, Japan)
The mass spectra of the standard model particles are reproduced in the gauge–Higgs grand unification in six-dimensional warped space without introducing exotic light fermions. Light neutrino masses are explained by the gauge–Higgs seesaw mechanism. We evaluate the effective potential of the four-dimensional Higgs boson appearing as a fluctuation mode of the Aharonov–Bohm phase in the extra-dimensional space, and show that the dynamical electroweak symmetry breaking takes place with the Higgs boson mass GeV and . The Kaluza–Klein mass scale in the fifth dimension is approximately given by .
