A data-driven method calibrates relative CMB polarization angles via cross-correlations without assuming zero isotropic birefringence or primordial EB, forecasting 0.10° and 0.17° uncertainties for SO LAT and Planck at 145 GHz if SO SATs reach 0.08°.
Abril-Cabezas et al., 7 The Simons Observatory: forecasted constraints on primordial gravitational waves with the expanded array of Small Aperture Telescopes,2512.15833
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Certain inflation models produce right-handed neutrinos via gravitational effects sufficient for leptogenesis to explain the baryon asymmetry, testable by inflationary gravitational waves.
An exactly solvable inflation model with negative cosmological constant from quantum cosmology is tested against Planck, ACT, and DESI data.
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Calibration of CMB Polarisation Using Cross-Experiment Correlations
A data-driven method calibrates relative CMB polarization angles via cross-correlations without assuming zero isotropic birefringence or primordial EB, forecasting 0.10° and 0.17° uncertainties for SO LAT and Planck at 145 GHz if SO SATs reach 0.08°.
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Nonthermal leptogenesis via cosmological gravitational particle production is tested by inflationary gravitational waves
Certain inflation models produce right-handed neutrinos via gravitational effects sufficient for leptogenesis to explain the baryon asymmetry, testable by inflationary gravitational waves.
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Natural Inflation with a negative cosmological constant
An exactly solvable inflation model with negative cosmological constant from quantum cosmology is tested against Planck, ACT, and DESI data.