Bounds on Tensor wave and Twisted Inflation

Abstract

We study the bounds on tensor wave in a class of twisted inflation models where $D(4+2k)$-branes are wrapped on cycles in the compact manifold and wrap the KK-direction in the corresponding effective field theory. While the lower bound is found to be analogous to that in Type IIB models of brane inflation, the upper bound turns out to be significantly different. This is argued for a range of values for the parameter $g_{s}M$ satisfying the self-consistency relation and the WMAP data. Further, we observe that the wrapped $D8$-brane appears to be the most attractive from a cosmological perspective.

5 pages

References in corpus (7)

• A Microscopic Limit on Gravitational Waves from D-brane Inflation
• Gravitational Wave Constraints on DBI Inflation
• Inflation from Wrapped Branes
• Primordial Non-Gaussianity and Gravitational Waves: Observational Tests of Brane Inflation in String Theory
• DBI N-flation
• Gravitational Wave Constraints on Multi-Brane Inflation
• Reheating a multi-throat universe by brane motion