On the stability of a soft-wall model
T Gherghetta, N Setzer
PHYSICAL REVIEW D | AMER PHYSICAL SOC | Published : 2010
We investigate the stability and fluctuations of a soft-wall model that has an asymptotically anti-de Sitter metric and a scalar field that has an asymptotically power-law dependence in the conformal coordinate. By imposing UV boundary conditions, the soft-wall mass scale can be fixed to be near the TeV scale and causes the radion to no longer be massless. A hierarchy between the weak scale and the Planck scale can be generated for various particle spectrum behavior, although natural values only occur for a gravitational sector containing scalar fields that act like unparticles. In addition, if bulk standard model fields have nonstandard couplings to the gravitational sector, then a discrete..View full abstract
We thank Brian Batell, Gero von Gersdorff, and Benedict von Harling for helpful discussions. This work is supported by the Australian Research Council.