Cross-correlation Power Spectra and Cosmic Birefringence of the CMB via Photon-neutrino Interaction

Mohammadi, Roohollah; Khodagholizadeh, Jafar; Sadegh, Mahdi; Vahedi, Ali

doi:10.48550/arxiv.2109.00152

Cited by 2 publications

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“…from Planck public data release 3 (PR3) [29]. Cosmological implications of this result have been discussed in [30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45]. An improved measurement of β = 0.30 ± 0.11 deg (68% C.L.)…”

Section: Introductionmentioning

confidence: 99%

Cosmic birefringence from monodromic axion dark energy

Gasparotto

Obata

2022

J. Cosmol. Astropart. Phys.

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The recently reported non-zero isotropic birefringence angle in Planck 2018 polarization data provides a tantalizing hint for new physics of axions. In this paper, we explain this by a string theory motivated axion with a monodromy potential that plays the role of dark energy. Upon using the birefringence measurement and the constraint on the equation of state for dark energy in this scenario, we find an upper bound on the axion decay constant as fa ≲ 1016 GeV. This naturally gives an energy scale of order GUT and can resolve the theoretical issue of super-Planckian field range of the conventional axion dark energy model. We further study the implications of cosmic birefringence for the underlying theory and its consequences for the string swampland conjectures. We finally discuss oscillatory features in the dark energy sector and the expected cosmic birefringence tomography.

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Section: Introductionmentioning

confidence: 99%

Cosmic birefringence from monodromic axion dark energy

Gasparotto

Obata

2022

J. Cosmol. Astropart. Phys.

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Cosmic Birefringence from Monodromic Axion Dark Energy

Gasparotto,

Obata

2022

Preprint

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The recently reported non-zero isotropic birefringence angle in Planck 2018 polarization data provides a tantalizing hint for new physics of axions. In this paper, we explain this by a string theory motivated axion with a monodromy potential that plays the role of dark energy. Upon using the birefringence measurement and the constraint on the equation of state for dark energy in this scenario, we find an upper bound on the axion decay constant as f a 10 16 GeV. This naturally gives an energy scale of order GUT and can resolve the theoretical issue of super-Planckian field range of the conventional axion dark energy model. We further study the implications of cosmic birefringence for the underlying theory and its consequences for the string swampland conjectures. We finally discuss oscillatory features in the dark energy sector and the expected cosmic birefringence tomography.

show abstract

Cross-correlation Power Spectra and Cosmic Birefringence of the CMB via Photon-neutrino Interaction

Cited by 2 publications

References 0 publications

Cosmic birefringence from monodromic axion dark energy

Cosmic birefringence from monodromic axion dark energy

Cosmic Birefringence from Monodromic Axion Dark Energy

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