Model of the quintessence axion

Abstract

We construct a model of the quintessence axion based on a gauged chiral $U(1)$ symmetry and an additional flat fifth dimension. The required high qualities are guaranteed by the brane separation. The observed cosmological constant (i.e., the potential energy of the quintessence axion) is determined by the size of the extra dimension and the axion decay constant $F_a$ is fixed almost at $F_a\simeq 10^{17}\mathrm{GeV}$, which is sufficiently large for the stability of the axion field near the hilltop of its potential. Furthermore, the movement of the axion can also easily explain the recently reported isotropic cosmic birefringence of the cosmic microwave background photon.

5 pages, 1 appendix; published on PRD

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• Wave Dark Matter
• New Extraction of the Cosmic Birefringence from the Planck 2018 Polarization Data
• Number-Theory Dark Matter
• Consistency of the string inspired electroweak axion with cosmic birefringence
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Cited by in corpus (2)

• Testing Quintessence Axion Dark Energy with Recent Cosmological Results
• How Viable Is a QCD Axion near 10 MeV?