QCD axion on hilltop by a phase shift of π.
Abstract We show that the initial misalignment angle of the QCD axion (or axion-like particles) can be set very close to π, if the QCD axion has a mixing with another heavy axion which induces the phase shift ≈ π after inflation. In the simplest case, the heavy axion plays the role of the inflaton,...
Main Authors: | , |
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Format: | Article |
Language: | English |
Published: |
SpringerOpen
2019-10-01
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Series: | Journal of High Energy Physics |
Subjects: | |
Online Access: | http://link.springer.com/article/10.1007/JHEP10(2019)120 |