Stability of gravity-scalar systems for domain-wall models with a soft wall
arXiv:1010.1628 · doi:10.1088/1742-6596/259/1/012034
Abstract
We show that it is possible to create an RS soft-wall model, a model with a compact extra dimension, without using fundamental branes. All that is required are bulk scalar fields minimally coupled to gravity. Of crucial importance is the stability of the size of the extra dimension. Without branes, one cannot easily implement the Goldberger-Wise mechanism, and instead it must be shown that the scalar configuration is stable in its own right. We use the superpotential approach for generating solutions, the so called 'fake supergravity' scenario, and show that configurations generated in such a way are always free of tachyonic modes. Furthermore, we show that the model is also free of zero modes (in the spin-0 sector) if all the scalars have odd parity. We discuss the hierarchy problem in soft-wall models, and applications of our analysis to the AdS/QCD correspondence.
arXiv comment6 pages, 4 figures, contribution to PASCOS 2010
References in corpus (14)
- A Large Mass Hierarchy from a Small Extra Dimension
- An Alternative to Compactification
- Linear Confinement and AdS/QCD
- Modeling the fifth dimension with scalars and gravity
- Fake Supergravity and Domain Wall Stability
- Electroweak Breaking on a Soft Wall
- Dynamical Soft-Wall AdS/QCD
- The Soft-Wall Standard Model
- The AdS/CFT/Unparticle Correspondence
- Holographic Unhiggs
- Bulk Fermions in Warped Models with a Soft Wall
- Stability of Scalar Fields in Warped Extra Dimensions
- Fermion Mass Hierarchy from the Soft Wall
- Fermion Flavor in Soft-Wall AdS