REVIEW 1 cited by
Can primordial parity violation explain the observed cosmic birefringence?
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
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 $\beta\approx 0.3$ 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.
Forward citations
Cited by 1 Pith paper
-
Planck PR4 (NPIPE) map-space cosmic birefringence
A map-space stacking analysis of Planck PR4 maps finds a CMB polarization rotation angle of about 0.46 to 0.48 degrees, dominated by instrument calibration uncertainty and consistent with no parity-violating cosmic bi...
Discussion (0). Continue with ORCID to comment.