66 research outputs found
Higgsless Gauge Symmetry Breaking with a Large Mass Hierarchy
We propose a mechanism of Higgsless gauge symmetry breaking with a large mass
hierarchy. We consider a 5D gauge theory on an orbifold . The gauge
symmetry is broken by orbifolding and also nontrivial boundary conditions at
fixed points. All 4D modes which survive at low energies are found to be
localized around fixed points. Supersymmetry plays an important role in our
mechanism. The tree-level unitarity in our model is briefly discussed.Comment: 9 pages, 1 figure, PTPTe
Emergent Supersymmetry in Warped Backgrounds
We show that quantum mechanical supersymmetries are emerged in Kaluza-Klein
spectrum of linearized gravity in several warped backgrounds as a consequence
of higher-dimensional general coordinate invariance. These emergent
supersymmetries play an essential role for the spectral structure of braneworld
gravity. We show that for the case of braneworld models with two codimension-1
branes the spectral pattern is completely determined only through the
supersymmetries
Supersymmetry and discrete transformations on S^1 with point singularities
We investigate N-extended supersymmetry in one-dimensional quantum mechanics
on a circle with point singularities. For any integer n, N=2n supercharges are
explicitly constructed and a class of point singularities compatible with
supersymmetry is clarified. Key ingredients in our construction are n sets of
discrete transformations, each of which forms an su(2) algebra of spin 1/2. The
degeneracy of the spectrum and spontaneous supersymmetry breaking are briefly
discussed.Comment: 11 pages, 3 figure
Supersymmetry in gauge theories with extra dimensions
We show that a quantum-mechanical N=2 supersymmetry is hidden in 4d mass
spectrum of any gauge invariant theories with extra dimensions. The N=2
supercharges are explicitly constructed in terms of differential forms. The
analysis can be extended to extra dimensions with boundaries, and for a single
extra dimension we clarify a possible set of boundary conditions consistent
with 5d gauge invariance, although some of the boundary conditions break 4d
gauge symmetries.Comment: 18 page
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