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Tuesday 26 June 2012, 09:35-10:10
Supersymmetric unification and R symmetries
- đ¤ Speaker: Ratz, M (Technische Universitt Mnchen)
- đ Date & Time: Tuesday 26 June 2012, 09:35 - 10:10
- đ Venue: Seminar Room 1, Newton Institute
Abstract
After reviewing some virtues and problems of the minimal supersymmetric standard model (MSSM), I will show that, if one demands anomaly freedom and fermion masses, only R symmetries can forbid the supersymmetric Higgs mass term mu. I will then prove that R symmetries are not available in conventional grand unified theories (GUTs) and argue that this prevents natural solutions to the doublet-triplet splitting problem in four dimensions. On the other hand, higher-dimensional GUTs do not suffer from this problem. I will briefly discuss an explicit string-derived model in which the mu and dimension five proton decay problems are solved by an order four discrete R symmetry, and comment on the higher-dimensional origin of this symmetry.
Series This talk is part of the Isaac Newton Institute Seminar Series series.
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