The lessons from the running of the tensor-to-scalar ratio
Astrophysics
2009-11-06 v3 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
We derive a simple consistency relation from the running of the tensor-to-scalar ratio. This new relation is first order in the slow-roll approximation. While for single field models we can obtain what can be found by using other observables, multi-field cases in general give non-trivial contributions dependent on the geometry of the field space and the inflationary dynamics, which can be probed observationally from this relation. The running of the tensor-to-scalar ratio may be detected by direct laser interferometer experiments.
Keywords
Cite
@article{arxiv.0710.3835,
title = {The lessons from the running of the tensor-to-scalar ratio},
author = {Jinn-Ouk Gong},
journal= {arXiv preprint arXiv:0710.3835},
year = {2009}
}
Comments
(v1) 7 pages, 1 figure; (v2) Discussions refined and references added; (v3) More discussions on detectability, to appear in Physical Review D