A domain wall description of brane inflation and observational aspects

Abstract

We consider a brane cosmology scenario by taking an inflating 3D domain wall immersed in a five-dimensional Minkowski space in the presence of a stack of $N$ parallel domain walls. They are static BPS solutions of the bosonic sector of a 5D supergravity theory. However, one can move towards each other due to an attractive force in between driven by bulk particle collisions and {\it resonant tunneling effect}. The accelerating domain wall is a 3-brane that is assumed to be our inflating early Universe. We analyze this inflationary phase governed by the inflaton potential induced on the brane. We compute the slow-roll parameters and show that the spectral index and the tensor-to-scalar ratio are within the recent observational data.

10 pages, 1 figure; version published in PLB

References in corpus (2)

• First-order framework and domain-wall/brane-cosmology correspondence
• Resonant Tunneling in Scalar Quantum Field Theory

Cited by in corpus (2)

• Brane inflation driven by an arctan potential: CMB constraints and Reheating
• Supersymmetric domain walls in maximal 6D gauged supergravity II