Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2010-04-28
JHEP 1011:105,2010
Physics
High Energy Physics
High Energy Physics - Theory
16 pages, 8 figures, v2 References added
Scientific paper
10.1007/JHEP11(2010)105
We give an explicit realization of the "String Axiverse" discussed in Arvanitaki et. al \cite{Arvanitaki:2009fg} by extending our previous results on moduli stabilization in $M$ theory to include axions. We extend the analysis of \cite{Arvanitaki:2009fg} to allow for high scale inflation that leads to a moduli dominated pre-BBN Universe. We demonstrate that an axion which solves the strong-CP problem naturally arises and that both the axion decay constants and GUT scale can consistently be around $2\times 10^{16}$ GeV with a much smaller fine tuning than is usually expected. Constraints on the Axiverse from cosmological observations, namely isocurvature perturbations and tensor modes are described. Extending work of Fox et. al \cite{Fox:2004kb}, we note that {\it the observation of tensor modes at Planck will falsify the Axiverse completely.} Finally we note that Axiverse models whose lightest axion has mass of order $10^{-15}$ eV and with decay constants of order $5\times 10^{14}$ GeV require no (anthropic) fine-tuning, though standard unification at $10^{16}$ GeV is difficult to accommodate.
Acharya Bobby Samir
Bobkov Konstantin
Kumar Piyush
No associations
LandOfFree
An M Theory Solution to the Strong CP Problem and Constraints on the Axiverse does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with An M Theory Solution to the Strong CP Problem and Constraints on the Axiverse, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An M Theory Solution to the Strong CP Problem and Constraints on the Axiverse will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-284069