Journal
PHYSICS LETTERS B
Volume 737, Issue -, Pages 124-128Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2014.08.045
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Funding
- The Dark Universe (Deutsche Forschungsgemeinschaft) [SFB-Transregio TR33]
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Natural (axionic) inflation[1] can accommodate sizeable primordial tensor modes but suffers from the necessity of trans-Planckian variations of the inflaton field. This problem can be solved via the mechanism of aligned axions[2], where the aligned axion spirals down in the potential of other axions. We elaborate on the mechanism in view of the recently reported observations of the BICEP2 collaboration[3]. (C) 2014 The Authors. Published by Elsevier B.V.
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