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={Brent Follin and Lloyd Knox and Marius 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. 

Figures from this paper

First constraint on the neutrino-induced phase shift in the spectrum of baryon acoustic oscillations
The existence of the cosmic neutrino background is a robust prediction of the hot big bang model. These neutrinos were a dominant component of the energy density in the early Universe and therefore
Neutrino refraction by the cosmic neutrino background
We have determined the dispersion relation of a neutrino test particle propagating in the cosmic neutrino background. Describing the relic neutrinos and antineutrinos from the hot big bang as a dense
Cosmological Neutrinos
Within the context of hot big-bang cosmology, a cosmic background of presently low energy neutrinos is predicted to exist in concert with the photons of the cosmic background radiation. The number
Cosmic Neutrinos and Other Light Relics
Cosmological measurements of the radiation density in the early universe can be used as a sensitive probe of physics beyond the standard model. Observations of primordial light element abundances
Phases of New Physics in the CMB
Fluctuations in the cosmic neutrino background are known to produce a phase shift in the acoustic peaks of the cosmic microwave background. It is through the sensitivity to this effect that the
Neutrino refraction by the cosmic neutrino
We have determined the dispersion relation of a neutrino test particle propagating in the cosmic neutrino background. Describing the relic neutrinos and antineutrinos from the hot big bang as a dense
Searching for Light Relics with the CMB
  • B. Wallisch
  • Physics
    Cosmological Probes of Light Relics
  • 2019
Fluctuations in the cosmic neutrino background are known to produce a phase shift in the acoustic peaks of the cosmic microwave background (CMB). It is through the sensitivity to this effect that the
Measurement of Neutrinos in the BAO Spectrum
  • B. Wallisch
  • Physics
    Cosmological Probes of Light Relics
  • 2019
The existence of the cosmic neutrino background is a remarkable prediction of the hot big bang model. These neutrinos were a dominant component of the energy density in the early universe and,
Probing decoupling in dark sectors with the cosmic microwave background
The acoustic peaks in the angular power spectrum of cosmic microwave background (CMB) temperature and polarization anisotropies play an important role as a probe of the nature of new relativistic
Can dark neutrino interactions phase out the Hubble tension?
New interactions of neutrinos can stop them from free streaming even after the weak interaction freezeout. This results in a phase shift in the cosmic microwave background (CMB) acoustic peaks which
...
1
2
3
4
5
...