期刊
PHYSICS LETTERS B
卷 728, 期 -, 页码 532-536出版社
ELSEVIER
DOI: 10.1016/j.physletb.2013.12.026
关键词
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资金
- Humboldt foundation
Constraints on inflationary scenarios and isocurvature perturbations have excluded the simplest and most generic models of dark matter based on QCD axions. Considering non-minimal kinetic couplings of scalar fields to gravity substantially changes this picture. The axion can account for the observed dark matter density avoiding the overproduction of isocurvature fluctuations. Finally, we show that assuming the same non-minimal kinetic coupling to the axion (dark matter) and to the standard model Higgs boson (inflaton) provides a minimal picture of early time cosmology. (C) 2013 The Authors. Published by Elsevier B.V. All rights
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