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11 papers · 1 filter
Enhanced Symmetries of Orbifolds from Moduli Stabilization
Wilfried Buchmuller, Riccardo Catena, Kai Schmidt-Hoberg
We study a supersymmetric field theory in six dimensions compactified on the orbifold T^2/Z_2 with two Wilson lines. After supersymmetry breaking, the Casimir energy fixes the shap…
Large hierarchies from approximate R symmetries
Rolf Kappl, Hans Peter Nilles, Saul Ramos-Sanchez +3
We show that hierarchically small vacuum expectation values of the superpotential in supersymmetric theories can be a consequence of an approximate R symmetry. We briefly discuss t…
Constructing de Sitter vacua in no-scale string models without uplifting
Laura Covi, Marta Gomez-Reino, Christian Gross +2
We develop a method for constructing metastable de Sitter vacua in N=1 supergravity models describing the no-scale volume moduli sector of Calabi-Yau string compactifications. We c…
Higgs versus Matter in the Heterotic Landscape
Wilfried Buchmuller, Jonas Schmidt
In supersymmetric extensions of the standard model there is no basic difference between Higgs and matter fields, which leads to the well known problem of potentially large baryon a…
Tensor calculus for supergravity on a manifold with boundary
Dmitry V. Belyaev, Peter van Nieuwenhuizen
Using the simple setting of 3D N=1 supergravity, we show how the tensor calculus of supergravity can be extended to manifolds with boundary. We present an extension of the standard…
Gauge-Higgs Unification from the Heterotic String
Jonas Schmidt
We present a 6D orbifold model on which emerges as intermediate step in the compactification of the heterotic string to the supersymmetric standard model in four dimensio…