Brany Liouville Inflation
General Relativity and Quantum Cosmology
2009-09-11 v4 Astrophysics
High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
We present a specific model for cosmological inflation driven by the Liouville field in a non-critical supersymmetric string framework, in which the departure from criticality is due to open strings stretched between the two moving Type-II 5-branes. We use WMAP and other data on fluctuations in the cosmic microwave background to fix parameters of the model, such as the relative separation and velocity of the 5-branes, respecting also the constraints imposed by data on light propagation from distant gamma-ray bursters. The model also suggests a small, relaxing component in the present vacuum energy that may accommodate the breaking of supersymmetry.
Cite
@article{arxiv.gr-qc/0407089,
title = {Brany Liouville Inflation},
author = {John Ellis and N. E. Mavromatos and D. V. Nanopoulos and A. Sakharov},
journal= {arXiv preprint arXiv:gr-qc/0407089},
year = {2009}
}
Comments
23 pages LATEX, two eps figures incorporated; version accepted for publication in NJP