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T: Fachverband Teilchenphysik

T 20: Beyond the Standard Model (Theorie) IV

T 20.3: Talk

Thursday, March 18, 2010, 17:15–17:30, HG XIV

Constraints on new physics models from perturbativity and gauge coupling unification — •Viviana Niro — Max-Planck-Institut fuer Kernphysik, Heidelberg, Germany

We investigate constraints that the requirements of perturbativity and gauge coupling unification impose on extensions of the Standard Model and of the MSSM. In particular, we discuss the renormalization group running in several SUSY left-right symmetric and Pati-Salam models and show how the various scales appearing in these models have to be chosen in order to achieve unification. We discuss arbitrary extensions of the Standard Model and of the MSSM and show how the requirement of perturbativity severely limits the particle content of any such model, especially in the supersymmetric case.