Primordial Gravitational Waves 2024
arXiv:2407.02714
Abstract
Primordial gravitational waves have crucial implications for the origin of the universe and fundamental physics. Using currently available cosmic microwave background data from Planck, ACT and SPT separately or their combinations with BK18 B-mode polarization and DESI observations, we give the strongest constraints on primordial gravitational waves so far.
arXiv commentMajor revision. Replacement due to numerical bugs found in codes. Conclusion changed. Only a strong upper bound on r is given