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Akinori Matsumoto

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Open access Sep 2026

A New Constraint on the Optical Depth from the Reionization History Independent of Cosmic Microwave Background Large-scale E-mode Polarization

Recent studies report a mild discrepancy between baryon acoustic oscillation (BAO) and cosmic microwave background (CMB) measurements within the ΛCDM framework. This discrepancy could be explained if the optical depth τ inferred from the CMB large-scale E-mode polarization is underestimated, which may be biased by fore...

Yuta Kageura, M. Ouchi, Fumihiro Naokawa et al. · 0 citations

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