5D Standing Waves Braneworlds

Merab Gogberashvili (Tbilisi State Univ.)

We find pure gravitational localization mechanism within the 5D standing wave braneworld. The model represents a single brane which bounds collective oscillations of gravitational and scalar field standing waves.

For the bulk ghost scalar fields and increasing warp factor we show localization of classical particles and zero modes of spin-0, -1, -2 and the left spin-1/2 fields on the brane, while right fermions are localized in the bulk. The cosmological solution provides with natural mechanisms of the dimensional reduction and brane
isotropization.

For the bulk real scalar fields and when the amplitude of the standing waves is small, matter fields are localized due to the presence of the horizon in the extra dimension. When oscillations are large, trapping is provided by the pressure of bulk waves. The mass of the lightest KK mode is determined by the smaller scale corresponding
to the horizon.

(Seminarraum II)