Implications of the cosmic birefringence measurement for the axion dark matter search. Issue 9 (26th September 2022)

• Record Type: Journal Article
• Authors: Obata, Ippei
• Is Part Of: Journal of cosmology and astroparticle physics. Volume 2022:Issue 9(2022)
• Publication Date: 2022-09-26
• Subjects: axions -- dark energy theory -- dark matter theory -- CMBR polarisation; Cosmology -- Periodicals; Astrophysics -- Periodicals; 523.0105
• DOI: 10.1088/1475-7516/2022/09/062
• Languages: English
• ISSNs: 1475-7516

Abstract

Abstract: We show that a recent constraint on the cosmic birefringence effect due to dark energy can be related to the constraints on the coupling of axion dark matter to photon, by relying on a simple model of two-axion alignment mechanism with periodic potentials. Owing to the alignment of the potentials, one linear combination of two fields provides a nearly flat direction and acts as dark energy, whereas the other combination provides a steep direction and acts as dark matter. This scenario solves the known conceptual issues of one-field model for dark energy and predicts the connection between seemingly disparate constraints on the dark sectors of our universe.