CMB probes on the correlated axion isocurvature perturbation

Kenji Kadota; Jinn Ouk Gong; Kiyotomo Ichiki; Takahiko Matsubara

doi:10.1088/1475-7516/2015/03/026

CMB probes on the correlated axion isocurvature perturbation

Kenji Kadota, Jinn Ouk Gong, Kiyotomo Ichiki, Takahiko Matsubara

Department of Science Education

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

We explore the possible cosmological consequence of the gravitational coupling between the inflaton and axion-like fields. In view of the forthcoming cosmic microwave background (CMB) polarization and lensing data, we study the sensitivity of the CMB data on the cross-correlation between the curvature and axion isocurvature perturbations. Through a concrete example, we illustrate the explicit dependence of the scale dependent cross-correlation power spectrum on the axion parameters.

Original language	English
Article number	026
Journal	Journal of Cosmology and Astroparticle Physics
Volume	2015
Issue number	3
DOIs	https://doi.org/10.1088/1475-7516/2015/03/026
State	Published - 13 Mar 2015

Bibliographical note

Publisher Copyright:
© 2015 IOP Publishing Ltd and Sissa Medialab srl.

Keywords

Axions
Cosmological parameters from CMBR

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10.1088/1475-7516/2015/03/026

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abstract = "We explore the possible cosmological consequence of the gravitational coupling between the inflaton and axion-like fields. In view of the forthcoming cosmic microwave background (CMB) polarization and lensing data, we study the sensitivity of the CMB data on the cross-correlation between the curvature and axion isocurvature perturbations. Through a concrete example, we illustrate the explicit dependence of the scale dependent cross-correlation power spectrum on the axion parameters.",

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AU - Matsubara, Takahiko

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Y1 - 2015/3/13

N2 - We explore the possible cosmological consequence of the gravitational coupling between the inflaton and axion-like fields. In view of the forthcoming cosmic microwave background (CMB) polarization and lensing data, we study the sensitivity of the CMB data on the cross-correlation between the curvature and axion isocurvature perturbations. Through a concrete example, we illustrate the explicit dependence of the scale dependent cross-correlation power spectrum on the axion parameters.

AB - We explore the possible cosmological consequence of the gravitational coupling between the inflaton and axion-like fields. In view of the forthcoming cosmic microwave background (CMB) polarization and lensing data, we study the sensitivity of the CMB data on the cross-correlation between the curvature and axion isocurvature perturbations. Through a concrete example, we illustrate the explicit dependence of the scale dependent cross-correlation power spectrum on the axion parameters.

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KW - Cosmological parameters from CMBR

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ER -

CMB probes on the correlated axion isocurvature perturbation

Abstract

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Keywords

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