Phenomenology of Large and Small Extra-Dimensions

por Andrea Donini (Universidad Autonoma de Madrid)

jueves 15 abr. 1999 12:00 → 13:00 Europe/Madrid

Sala Seminarios (Dpto. de Fisica Teorica (UVEG))

The Hierarchy Problem could be solved within a fundamental (4+n)-dimensional theory, if the typical scale where gravity and gauge interactions unify is at the TeV-scale. The preferred framework for this scenario is Type I String Theory, where the string scale could be lowered to the TeV if the compactified manifold is sufficiently large. Kaluza-Klein (KK) excitations of the graviton are expected, whereas no KK modes for the gauge bosons arise if the gauge group is tied to a D3-brane. In this scenario, typical signatures such as direct production of KK modes of the graviton at high-energy colliders could test the size of the compactified dimensions. However, in the general case of anisotropic compactification, Winding Modes of the Standard Model gauge bosons could also be directly observable, thus further constraining the model."