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First constraint on the neutrino-induced phase shift in the spectrum of baryon acoustic oscillations

In the early Universe, fluctuations in the neutrino density produced a distinct shift in the temporal phase of sound waves in the primordial plasma. The size of this phase shift has now been constrained through baryon acoustic oscillation data.

Daniel Baumann
Florian Beutler
Christophe Yèche
Research25 Feb 2019
Nature Physics

Volume: 15, P: 465-469

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First constraint on the neutrino-induced phase shift in the spectrum of baryon acoustic oscillations

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