Speaker
Mert Aybat
(Nikhef)
Description
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 apporach for generating
solutions, the so called 'fake supergravity' scenario, and show
that configurations generated in such a way with N scalars coupled
minimally to gravity are always free of
tachyonic modes. We also analyze the existence of zero modes. We present
a theorem that relates the number of zero modes to the parities of the
background solutions, for which we also present some examples.
Primary author
Mert Aybat
(Nikhef)
Co-author
Damien George
(Nikhef)
