Domain walls and fermion scattering in grand unified models
Domain walls and fermion scattering in grand unified models
Motivated by grand unification, we study the properties of domain walls formed in a model with $SU(5)\ifmmode\times\else\texttimes\fi{}{Z}_{2}$ symmetry which is spontaneously broken to $SU(3)\ifmmode\times\else\texttimes\fi{}SU(2)\ifmmode\times\else\texttimes\fi{}U(1)/{Z}_{6}$, and subsequently to $SU(3)\ifmmode\times\else\texttimes\fi{}U(1)/{Z}_{3}$. Even after the first stage of symmetry breaking, the $SU(3)$ symmetry is broken to $SU(2)\ifmmode\times\else\texttimes\fi{}U(1)/{Z}_{2}$ on the domain wall. In a certain …