Topic
Neutrino decoupling
About: Neutrino decoupling is a research topic. Over the lifetime, 498 publications have been published within this topic receiving 21675 citations.
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01 Jan 1990
TL;DR: In this article, the Robertson-Walker Metric is used to measure the radius of the Planck Epoch in the expanding universe, which is a measure of the number of atoms in the universe.
Abstract: * Editors Foreword * The Universe Observed * Robertson-Walker Metric * Standard Cosmology * Big-Bang Nucleosynthesis * Thermodynamics in the Expanding Universe * Baryogenesis * Phase Transitions * Inflation * Structure Formation * Axions * Toward the Planck Epoch * Finale
6,319 citations
TL;DR: In this article, the effect of three-neutrino flavour oscillations on the decoupling process of neutrinos has been studied by solving the momentum-dependent kinetic equations for the neutrino spectra.
757 citations
TL;DR: In this paper, the cosmological implications of neutrinos are reviewed at a different level of scrutiny, including neutrino mass, neutrini mass limits and their effect on primordial nucleosynthesis.
537 citations
TL;DR: In this paper, the incoherent resonant and non-resonant scattering production of neutrinos in the early universe was investigated and a range of sterile neutrino masses, vacuum mixing angles, and initial lepton numbers were derived for hot, warm, and cold dark matter (HDM, WDM, CDM) candidates.
Abstract: We calculate the incoherent resonant and non-resonant scattering production of sterile neutrinos in the early universe. We find ranges of sterile neutrino masses, vacuum mixing angles, and initial lepton numbers which allow these species to constitute viable hot, warm, and cold dark matter (HDM, WDM, CDM) candidates which meet observational constraints. The constraints considered here include energy loss in core collapse supernovae, energy density limits at big bang nucleosynthesis, and those stemming from sterile neutrino decay: limits from observed cosmic microwave background anisotropies, diffuse extragalactic background radiation, and ${}^{6}\mathrm{L}\mathrm{i}/\mathrm{D}$ overproduction. Our calculations explicitly include matter effects, both effective mixing angle suppression and enhancement (MSW resonance), as well as quantum damping. We for the first time properly include all finite temperature effects, dilution resulting from the annihilation or disappearance of relativistic degrees of freedom, and the scattering-rate-enhancing effects of particle-antiparticle pairs (muons, tauons, quarks) at high temperature in the early universe.
516 citations
TL;DR: In this paper, the authors investigate the interaction of neutrinos with a thermal background in the framework of the standard model of weak interactions and calculate the lowest order contribution to the refractive index, including the imaginary part and corrections from the finite gauge boson masses.
384 citations