A First Detection of the Acoustic Ocillation Phase Shift Expected from the Cosmic Neutrino Background
Jim Rich
SPP
Mardi 10/11/2015, 13:30-14:30
Bat 141, salle André Berthelot (143) , CEA Paris-Saclay
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 (CMB) temperature power spectrum.
http://arxiv.org/abs/1503.07863
Contact : Jean-marc
LE-GOFF
