Author

B. Sherwin

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Preprint Oct 2026

Alleviating CMB-BAO tension with a large cosmic birefringence angle during reionization induced by energy injection to axion-like particles

The recent measurement of baryon acoustic oscillations by the Dark Energy Spectroscopic Instrument reveals a mild tension with observations of the cosmic microwave background (CMB) within the standard $\Lambda$CDM cosmological model. Another interesting hint beyond standard cosmology arises from recent analyses of Plan...

S. S. Sirletti, Toshiya Namikawa, B. Sherwin · 0 citations

Preprint Jul 2026

Measuring Cosmic Neutrino Masses Independently of Dark Energy

Neutrino oscillations establish that neutrinos are massive, providing the only laboratory detection of physics beyond the Standard Model. Direct kinematic experiments bound the electron-neutrino mass to $m_{\nu_e}<0.45$ eV (KATRIN, 90% CL), implying $\sum m_\nu \lesssim 1.3$ eV. Conversely, cosmology within $\Lambda$CD...

Frank J. Qu, F. Ge, Hanyue Wang et al. · 1 citation