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- W4301701910 abstract "Recently, the cross-correlation between $E$- and $B$-mode polarization of the cosmic microwave background (CMB), which is well explained by cosmic birefringence with rotation angle $betaapprox 0.3$ deg, has been found in CMB polarization data. We carefully investigate the possibility of explaining the observed $EB$ correlation by the primordial chiral gravitational waves (CGWs), which can be generated in the parity-violating theories in the primordial Universe. We found that the CGWs scenario does not work due to the overproduction of the $BB$ auto-correlation which far exceeds the observed one by SPTPol and POLARBEAR." @default.
- W4301701910 created "2022-10-05" @default.
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- W4301701910 date "2022-08-17" @default.
- W4301701910 modified "2023-10-16" @default.
- W4301701910 title "Can primordial parity violation explain the observed cosmic birefringence?" @default.
- W4301701910 doi "https://doi.org/10.48550/arxiv.2208.08101" @default.
- W4301701910 hasPublicationYear "2022" @default.
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