TY - JOUR
T1 - Detection of isotropic cosmic birefringence and its implications for axionlike particles including dark energy
AU - Fujita, Tomohiro
AU - Murai, Kai
AU - Nakatsuka, Hiromasa
AU - Tsujikawa, Shinji
N1 - Funding Information:
We would like to thank Yuto Minami and Masahiro Kawasaki for fruitful discussions and productive comments. This work is supported by the Grant-in-Aid for Scientific Research Fund of the JSPS No. 18K13537 (T.F.), No. 20J20248 (K.M.), No. 19J21974 (H.N.), and No. 19K03854 (S.T.). K.M. is supported by World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan and the Program of Excellence in Photon Science. H.N. is supported by Advanced Leading Graduate Course for Photon Science.
Funding Information:
We would like to thank Yuto Minami and Masahiro Kawasaki for fruitful discussions and productive comments. This work is supported by the Grant-in-Aid for Scientific Research Fund of the JSPS No. 18K13537 (T. F.), No. 20J20248 (K. M.), No. 19J21974 (H. N.), and No. 19K03854 (S. T.). K. M. is supported by World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan and the Program of Excellence in Photon Science. H. N. is supported by Advanced Leading Graduate Course for Photon Science.
Publisher Copyright:
© 2021 American Physical Society.
PY - 2021/2/5
Y1 - 2021/2/5
N2 - We investigate the possibility that axionlike particles (ALPs) with various potentials account for the isotropic birefringence recently reported by analyzing the Planck 2018 polarization data. For the quadratic and cosine potentials, we obtain lower bounds on the mass, coupling constant to photon g, abundance and equation of state of the ALP to produce the observed birefringence. Especially when the ALP is responsible for dark energy, it is possible to probe the tiny deviation of dark energy equation of state from-1 through the cosmic birefringence. We also explore ALPs working as early dark energy (EDE), which alleviates the Hubble tension problem. Since the other parameters are limited by the EDE requirements, we narrow down the ALP-photon coupling to 10-19 GeV-1g10-16 GeV-1 for the decay constant f=Mpl. Therefore, the Hubble tension and the isotropic birefringence imply that g is typically the order of f-1, which is a nontrivial coincidence.
AB - We investigate the possibility that axionlike particles (ALPs) with various potentials account for the isotropic birefringence recently reported by analyzing the Planck 2018 polarization data. For the quadratic and cosine potentials, we obtain lower bounds on the mass, coupling constant to photon g, abundance and equation of state of the ALP to produce the observed birefringence. Especially when the ALP is responsible for dark energy, it is possible to probe the tiny deviation of dark energy equation of state from-1 through the cosmic birefringence. We also explore ALPs working as early dark energy (EDE), which alleviates the Hubble tension problem. Since the other parameters are limited by the EDE requirements, we narrow down the ALP-photon coupling to 10-19 GeV-1g10-16 GeV-1 for the decay constant f=Mpl. Therefore, the Hubble tension and the isotropic birefringence imply that g is typically the order of f-1, which is a nontrivial coincidence.
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U2 - 10.1103/PhysRevD.103.043509
DO - 10.1103/PhysRevD.103.043509
M3 - Article
AN - SCOPUS:85100985145
SN - 2470-0010
VL - 103
JO - Physical Review D
JF - Physical Review D
IS - 4
M1 - 043509
ER -