Source record / 2021
BICEP/Keck XIII: Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season
BICEP/Keck Collaboration; P. A. R. Ade et al.
Paper
Publication
Physical Review Letters 127, 151301 · 2021
DOI: 10.1103/PhysRevLett.127.151301
Why it is in this atlas
Historical published tensor-to-scalar bound; not asserted to be the latest worldwide constraint.
Citation identity and relevance checked 2026-10-18. Check the original version and supplementary material before using a result. Inclusion does not imply endorsement by the authors.