https://doi.org/10.1140/epjc/s10052-018-5529-2
Regular Article - Theoretical Physics
A perturbative RS I cosmological phase transition
1
Department of Physics, Skidmore College, Saratoga Springs, NY, 12866, USA
2
Department of Physics, Syracuse University, Syracuse, NY, 13244, USA
3
School of Physics, Korea Institute for Advanced Study, Seoul, 130-722, South Korea
* e-mail: jhubisz@syr.edu
Received:
11
August
2017
Accepted:
6
January
2018
Published online:
29
January
2018
We identify a class of Randall–Sundrum type models with a successful first order cosmological phase transition during which a 5D dual of approximate conformal symmetry is spontaneously broken. Our focus is on soft-wall models that naturally realize a light radion/dilaton and suppressed dynamical contribution to the cosmological constant. We discuss phenomenology of the phase transition after developing a theoretical and numerical analysis of these models both at zero and finite temperature. We demonstrate a model with a TeV-Planck hierarchy and with a successful cosmological phase transition where the UV value of the curvature corresponds, via AdS/CFT, to an N of 20, where 5D gravity is expected to be firmly in the perturbative regime.
© The Author(s), 2018
