Limits on Neutrino-Neutrino Scattering in the Early Universe

Abstract

In the standard model neutrinos are assumed to have streamed across the Universe since they last scattered at the weak decoupling epoch when the temperature of the standard-model plasma was ~MeV. The shear stress of free-streaming neutrinos imprints itself gravitationally on the Cosmic Microwave Background (CMB) and makes the CMB a sensitive probe of neutrino scattering. Yet, the presence of nonstandard physics in the neutrino sector may alter this standard chronology and delay neutrino free-streaming until a much later epoch. We use observations of the CMB to constrain the strength of neutrino self-interactions G_eff and put limits on new physics in the neutrino sector from the early Universe. Recent measurements of the CMB at large multipoles made by the Planck satellite and high-l experiments are critical for probing this physics. Within the context of conventional LambdaCDM parameters cosmological data are compatible with G_eff < 1/(56 MeV)^2 and neutrino free-streaming might be delayed until their temperature has cooled to as low as ~25 eV. Intriguingly, we also find an alternative cosmology compatible with cosmological data in which neutrinos scatter off each other until z~10^4 with a preferred interaction strength in a narrow region around $G_{\mathrm{eff}}\simeq 1/(10\mathrm{MeV}{)}^2\simeq 8.6\times 10^8{G}_{\mathrm{F}}$, where $G_{\mathrm{F}}$ is the Fermi constant. This distinct self-interacting neutrino cosmology is characterized by somewhat lower values of both the scalar spectral index and the amplitude of primordial fluctuations. While we phrase our discussion here in terms of a specific scenario in which a late onset of neutrino free-streaming could occur, our constraints on the neutrino visibility function are very general.

9 Pages, 4 figures, 1 table. v2: Version accepted for publication, enhanced discussion on neutrino interaction beyond the SM, enhanced figures, references added

References in corpus (18)

• The T2K Neutrino Flux Prediction
• A ménage à trois of eV-scale sterile neutrinos, cosmology, and structure formation
• ACTPol: A polarization-sensitive receiver for the Atacama Cosmology Telescope
• How secret interactions can reconcile sterile neutrinos with cosmology
• Cosmic neutrino cascades from secret neutrino interactions
• Updated constraints on non-standard neutrino interactions from Planck
• Cosmological bounds on dark matter-neutrino interactions
• SPTpol: an instrument for CMB polarization measurements with the South Pole Telescope
• IceCube PeV-EeV Neutrinos and Secret Interactions of Neutrinos
• Revising Limits on Neutrino-Majoron Couplings
• Constraints on Light Dark Matter From Core-Collapse Supernovae
• Comment on "Is Dark Matter with Long-Range Interactions a Solution to All Small-Scale Problems of ΛCDM Cosmology?"
• Tight bonds between sterile neutrinos and dark matter
• Are cosmological neutrinos free-streaming?
• Self-interacting Dark Radiation
• Detecting MeV Gauge Bosons With High-Energy Neutrino Telescopes
• Bulk viscosity of a gas of neutrinos and coupled scalar particles, in the era of recombination
• Anisotropies in the Cosmic Neutrino Background after WMAP 5-year Data

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