As of 2025, the polarization signal from primordial gravitational waves has not been detected by BICEP or the Keck Array.
Sources
- BICEP and Keck Array (en.wikipedia.org)
- https://arxiv.org/abs/2203.16556 (arxiv.org)
- https://iopscience.iop.org/article/10.3847/1538-4357/ac9ea3 (iopscience.iop.org)
- https://cerncourier.com/a/bicep-crunches-primordial-gravitational-waves/ (cerncourier.com)
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