Seminar: Finite Theories Before and After the Discovery of a Higgs Boson at the LHC

Friday October 18 2013, 2:30pm - Seminar room

Speaker: George Zoupanos (National Technical University Athens & IFT Madrid)

Abstract:
Finite Unified Theories (FUTs) are N = 1 supersymmetric Grand Unified Theories (GUTs) which can be made finite to all-loop orders, based on the principle of reduction of couplings, and therefore are provided with a large predictive power.

Confronting the predictions of SU(5) FUTs with the top and bottom quark masses and other low-energy experimental constraints a light Higgs-boson mass in the range Mh = 121 - 126 GeV was predicted, in striking agreement with the recent discovery of a Higgs-like state around ∼ 125.5 GeV at ATLAS and CMS. Furthermore the favoure dmodel, a finiteness constrained version of the MSSM, naturally predicts a relatively heavy spectrum with coloured supersymmetric particles above ∼ 1.5 TeV, consistent with the non-observation of those particles at the LHC. Restricting further the best FUT's parameter space according to the discovery of a Higgs-like state and B-physics observables we find predictions for the rest of the Higgs masses and the supersymmetric particle spectrum.

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