First Detection of the Acoustic Oscillation Phase Shift Expected from the Cosmic Neutrino Background.
@article{Follin2015FirstDO,
title={First Detection of the Acoustic Oscillation Phase Shift Expected from the Cosmic Neutrino Background.},
author={B. Follin and L. Knox and M. Millea and Zhen Pan},
journal={Physical review letters},
year={2015},
volume={115 9},
pages={
091301
}
}The unimpeded relativistic propagation of cosmological neutrinos prior to recombination of the baryon-photon plasma alters gravitational potentials and therefore the details of the time-dependent gravitational driving of acoustic oscillations. We report here a first detection of the resulting shifts in the temporal phase of the oscillations, which we infer from their signature in the cosmic microwave background temperature power spectrum.
