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New Extraction of the Cosmic Birefringence from the Planck 2018 Polarization Data
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abstract
We search for evidence of parity-violating physics in the Planck 2018 polarization data, and report on a new measurement of the cosmic birefringence angle, $\beta$. The previous measurements are limited by the systematic uncertainty in the absolute polarization angles of the Planck detectors. We mitigate this systematic uncertainty completely by simultaneously determining $\beta$ and the angle miscalibration using the observed cross-correlation of the $E$- and $B$-mode polarization of the cosmic microwave background and the Galactic foreground emission. We show that the systematic errors are effectively mitigated and achieve a factor-of-$2$ smaller uncertainty than the previous measurement, finding $\beta=0.35 \pm 0.14\,\deg$ (68% C.L.), which excludes $\beta = 0$ at $99.2$% C.L. This corresponds to the statistical significance of $2.4\sigma$.
Forward citations
Cited by 31 Pith papers
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CMB Birefringence from Vacuum Interfaces
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No evidence for cosmological parity violation is found in the first kurto-spectrum analysis of BOSS DR12 and DESI DR1 luminous red galaxies.
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First astrometric constraints on parity-violation in the gravitational wave background
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No evidence for parity violation in BOSS
New statistics applied to BOSS data show the reported parity violation signal is consistent with zero after accounting for eight-point correlation function mismatch between data and mocks.
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Probing Parity Violation with Weak Lensing Trispectrum
A parity-odd weak lensing convergence trispectrum is derived and forecast to be detectable with DES Y3/LSST Y10-like surveys under optimistic template amplitudes.
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Gravitational Wave Birefringence in generalized Palatini Chern Simons
Palatini f(R)+Chern–Simons gravity predicts amplitude and velocity birefringence in GW propagation, with the effect controlled by f_R and, under de-Sitter approximations, growing polynomially with redshift.
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A phase-space basis ('Wigner function shapelets') is constructed for galaxy images, with explicit formulas for weak-lensing responses and a proposed parity-violation probe.
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Parity-odd Four-Point Correlation Function from DESI Data Release 1 Luminous Red Galaxy Sample
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Planck constraints on the scale dependence of isotropic cosmic birefringence
Planck polarization data favor a constant cosmic birefringence angle (β≈0.3°) across multipoles, with scale dependence consistent with zero at up to 1.8σ.
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Twisted echoes of an odd quartet: Scalar-induced gravitational waves as a probe of primordial parity-violation
A parity-odd primordial trispectrum imprints measurable left-right asymmetry in scalar-induced gravitational waves, and the chirality ratio directly tracks the parity-odd to parity-even trispectrum amplitude ratio.
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Wading the String Bog: CMB Birefringence in the Swampland
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Constraining primordial non-Gaussianity and parity-violation through Scalar-Induced Gravitational Waves with next-generation ground-based interferometers
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Revisiting constraints on primordial vector modes and implications for sourced magnetic fields and observed $EB$ power spectrum
Updated constraints on neutrino-sustained primordial vector modes imply magnetic fields too weak to seed observations and cannot reproduce the EB power spectrum while satisfying parity-even limits.
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Theoretical and Observational Bounds on Dynamical Chern-Simons Gravity as an Effective Field Theory
Causality from Shapiro delay and UV species/perturbativity bounds force the dynamical Chern-Simons coupling to be tiny for macroscopic gravitational systems.
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Theoretical and Observational Bounds on Dynamical Chern-Simons Gravity as an Effective Field Theory
Dynamical Chern-Simons gravity is bounded by causality and perturbativity to produce only tiny corrections on macroscopic gravitational systems.
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CMB Birefringence from Vacuum Interfaces
CMB polarization rotation can arise as a frequency-independent Pancharatnam phase when photons cross dark-sector vacuum interfaces, with no ultralight axion required.
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Cosmic Birefringence from the Atacama Cosmology Telescope Data Release 6
Bayesian analysis of ACT DR6 CMB polarization data measures cosmic birefringence angle β = 0.215° ± 0.074° excluding zero at 2.9σ, consistent with prior WMAP and Planck results but limited by unexplained systematics.
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Systematic dataset swaps show DESY5 low-redshift SNIa, Planck CMB plus lensing, and DESI-DR2 BAO as the dominant sources of w0waCDM tension with ΛCDM, while other combinations remain consistent.
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A short review on Quintom dark energy theory
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