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Bonn 2010 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 8: Eingeladene Vorträge III

T 8.1: eingeladener Vortrag

Donnerstag, 18. März 2010, 14:00–14:35, HG X

New theories for a natural Fermi scale — •Andreas Weiler — CERN, Geneva, Switzerland

We are certain that the electro-weak symmetry is a gauge symmetry and that the longitudinal components of the heavy vector bosons are the Goldstone bosons of a spontaneous breaking of the electro-weak gauge group. What we do not know is the mechanism behind the breaking. If an elementary scalar field like the Higgs in the Standard Model is responsible we are left sensitive to heavy scales in nature like the unification scale or the Planck scale. Since we do not believe that the laws of nature require fine-tuned boundary conditions we expect a UV regulator not much above a TeV. The LHC will very likely not only discover the agent of electro-weak symmetry breaking but also the stabilizing principle behind it, like supersymmetry, extra-dimensions, compositeness, techni-color or a large conformal sector. In this talk I will review recent proposals that go beyond the paradigm of the Minimal Supersymmetric Standard Model (MSSM). I will concentrate on two main directions: 1) strongly coupled models that have seen a recent revival like the holographic composite Higgs and 2) deformations of the MSSM, like supersymmetric Little Higgs models and the NMSSM with special emphasis on non-standard Higgs phenomenology.

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