Multi-Localization in Multi-Brane Worlds (original) (raw)
This Thesis presents a study of higher dimensional brane-world models with nonfactorizable geometry. In the picture of brane-world, Standard Model fields are assumed to be localized or confined on a lower dimensional topological defect (brane) in the higher dimensional space (bulk). When the space is curved, due to the presence of an energy density distribution, the non-trivial geometry can induce localization of gravity across the extra dimension. This implies that, in particular constructions, gravity can be localized on the brane. The localization of gravity leads to the realization that, if extra dimensions exists, they need not be compact. It is shown that in the context of multi-brane world constructions with localized gravity the phenomenon of multi-localization is possible. When the latter scenario is realized, the KK spectrum contains special ultralight and localized KK state(s). Existence of such states give the possibility that gravitational interactions as we realize them are the net effect of the massless graviton and the special KK state(s).
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