期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 11, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP11(2010)105
关键词
Strings and branes phenomenology; Phenomenology of Field Theories in Higher Dimensions
资金
- DOE [DOE/ER/01545-885, DE-AC02-05CH11231]
- National Science Foundation [PHY05-51164, PHY-04-57315]
We give an explicit realization of the String Axiverse discussed in Arvanitaki et. al [1] by extending our previous results on moduli stabilization in M theory to include axions. We extend the analysis of [1] 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 x 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 [2], we note that 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 x 10(14) GeV require no (anthropic) fine-tuning, though standard unification at 10(16) GeV is difficult to accommodate.
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