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T: Fachverband Teilchenphysik
T 19: Beyond The Standard Model (Theorie) 3
T 19.1: Talk
Friday, March 13, 2009, 14:00–14:15, M114
Two Step Unification — •Felix Braam1, Jürgen Reuter1, and Wolfgang Kilian2 — 1Universität, Freiburg — 2Universität, Siegen
Grand unified theories based on an E6 gauge symmetry are possible low energy scenarios of string theories. In addition to Quark and Lepton fields, the fundamental 27 of the E6 contains one up- and down-type Higgs superfield, a pair of exotic particles ("Leptoquarks"), and a NMSSM-like Singlet under the SM gauge group for each generation. The appearance of the Leptoquarks spoil simple gauge coupling unification. Embedding the SM into a Pati-Salam gauge group above 1016 GeV, one achieves full E6 unification below the Planck mass. Aside from model building aspects, implications for physics at the TeV scale will be presented. Three generations of Higgs fields may introduce a new type of dark matter in addition to the usual LSP. The signatures of TeV-scale Leptoquarks are studied using the event generator WHIZARD.