[SEMINARI]: Dr. Donini: Phenomenology of Large and Small Extra-Dimensions

[Arcadi Santamaria]

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                              S E M I N A R I

            [Image]    Departament de Física Teòrica     [Image]
                          Universitat de València
                      46100 Burjassot (València) Spain

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                Phenomenology of Large and Small Extra-Dimensions

                                Andrea Donini

                      (Universidad Autonoma de Madrid)

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                     Aula de Seminaris de Física Teòrica
                  Thursday 15 of April of 1999 at 12:00 AM
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                                    Resum

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."

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