Cosmological Nucleosynthesis and Active-Sterile Neutrino Oscillations with Small Mass Differences: The Nonresonant Case

Abstract

We study the nonresonant oscillations between left-handed electron neutrinos nu_e and nonthermalized sterile neutrinos nu_s in the early Universe plasma. The case when nu_s do not thermalize till 2 MeV and the oscillations become effective after nu_e decoupling is discussed. The evolution of neutrino ensembles was described numerically by integrating the kinetic equations for the neutrino density matrix in momentum space. We have provided a detail numerical study of the influence of the nonequilibrium nu_e - nu_s oscillations on the primordial production of He-4. The exact kinetic approach enabled us to calculate the effects of neutrino population depletion, the distortion of the neutrino energy spectrum and the generation of neutrino-antineutrino asymmetry on the kinetics of neutron-to-proton transitions during the primordial nucleosynthesis epoch and correspondingly on the cosmological He-4 production. It was shown that the neutrino population depletion and spectrum distortion play an important role. The asymmetry effect, in case the lepton asymmetry is accepted initially equal to the baryon one, is proved to be negligible for the discussed range of delta m^2. Constant helium contours in delta m^2 - theta plain were obtained for small mass differences delta m^2 < 10^{-7} eV^2. More precise cosmological constraints on mixing parameters were obtained.

RevTex, 13 pages, 8 figures, minor text corrections, some references added, submitted to Phys. Rev. D

References in corpus (64)

• Solar Models with Helium and Heavy Element Diffusion
• Evidence for ${\bar{\nu }}_{\mu }\to {\bar{\nu }}_e$ Oscillations from the LSND Experiment at LAMPF
• Big Bang nucleosynthesis and physics beyond the Standard Model
• Candidate Events in a Search for Muon Antineutrino to Electron Antineutrino Oscillations
• Big-Bang Nucleosynthesis and the Baryon Density of the Universe
• Measurement of the atmospheric neutrino flavour composition in Soudan 2
• Neutrino physics and the mirror world: how exact parity symmetry explains the solar neutrino deficit, the atmospheric neutrino anomaly and the LSND experiment
• Reconciling Present Neutrino Puzzles: Sterile Neutrinos as Mirror Neutrinos
• The Primordial Abundance of He4: An Update
• Nonequilibrium Corrections to the Spectra of Massless Neutrinos in the Early Universe
• Neutrino decoupling in the early Universe
• Cold + Hot Dark Matter Cosmology with $m({\nu }_{\mu })\approx m({\nu }_{\tau })\approx 2.4$ ev
• On the Abundance of Primordial Helium
• Big Bang Nucleosynthesis in Crisis?
• Large neutrino asymmetries from neutrino oscillations
• A sterile neutrino scenario constrained by experiments and cosmology
• Solutions to Solar Neutrino Anomaly
• Solar Model Uncertainties, MSW Analysis, and Future Solar Neutrino Experiments
• Neutrinoless Double Beta Decay and the Solar Neutrino Problem
• Constraints on Neutrino Oscillations from Big Bang Nucleosynethesis
• Studies of neutrino asymmetries generated by ordinary-sterile neutrino oscillations in the early universe and implications for big bang nucleosynthesis bounds
• Models of Light Singlet Fermion and Neutrino Phenomenology
• Refined Big Bang Nucleosynthesis Constraints on ${\Omega }_{Baryon}$ and $N_{\nu }$
• Neutrino Masses in an Extended Gauge Model with E_6 Particle Content
• Short-baseline neutrino oscillations and neutrinoless double-beta decay in schemes with an inverted mass spectrum
• An SO(10)XS-4 Scenario for Naturally Degenerate Neutrinos
• Chaotic Amplification of Neutrino Chemical Potentials by Neutrino Oscillations in Big Bang Nucleosynthesis
• How Many Solar Neutrino Experiments Are Wrong?
• Model of Four Light Neutrinos in the Light of All Present Data
• Quasi-degenerate neutrinos from an abelian family symmetry
• On The Vacuum Oscillation Solution of The Solar Neutrino Problem
• Cosmological Implications of Two Conflicting Deuterium Abundances
• Results from the LSND Neutrino Oscillation Search
• Can a ``natural'' three-generation neutrino mixing scheme satisfy everything?
• Boron neutrino flux and the MSW solution of the solar neutrino problem
• Testing the Vacuum Oscillation and the MSW Solutions of the Solar Neutrino Problem
• Accomodating Solar and Atmospheric Neutrino Deficits, Hot Dark Matter, and a Double Beta Decay Signal
• Quasi Goldstone Fermion As a Sterile Neutrino
• Effect of Neutrino Heating on Primordial Nucleosynthesis
• Do experiments and astrophysical considerations suggest an inverted neutrino mass hierarchy?
• Primordial Nucleosynthesis with a Decaying Tau Neutrino
• Model Independent Determination of the Solar Neutrino Spectrum with and without MSW
• Big Bang Nucleosynthesis Constraints and Light Element Abundance Estimates
• No Crisis for Big Bang Nucleosynthesis
• Nonequilibrium Neutrino Oscillations and Primordial Production of He-4
• Neutrinos with Magnetic Moment: Depolarization Rate in Plasma
• Short-baseline neutrino oscillations and neutrinoless double-beta decay in the framework of three neutrino mixing and a mass hierarchy
• Possible Implications of the Atmospheric, the Bugey, and the Los Alamos Neutrino Experiments
• "Nucleosynthesis constraints on active-sterile neutrino conversions in the early universe with random magnetic field"
• Neutrino Flavor Mixing Constrained by Accelerator and Reactor Experiments and Solar Neutrino Observation
• Last Hope for an astrophysical solution to the solar neutrino problem
• Just So? Vacuum Oscillations and MSW: An Update
• Vacuum oscillation solution to the solar neutrino problem in standard and non-standard pictures
• Neutrino Oscillations in the Early Universe with Nonequilibrium Neutrino Distributions
• On the MSW ${\nu }_e\to {\nu }_s$ transition solution of the solar neutrino problem
• Tau Neutrino Decays and Big Bang Nucleosynthesis
• Massive Decaying Tau Neutrino and Big Bang Nucleosynthesis
• Helioseismic constraints to the central solar temperature and neutrino fluxes
• Possible Revelation of Seesaw Mass Pattern in Solar and Atmospheric Neutrino Data
• Muon-anti-neutrino <---> electron-anti-neutrino mixing: analysis of recent indications and implications for neutrino oscillation phenomenology
• Three-Neutrino Mixing and Combined Vacuum Oscillations and MSW Transitions of Solar Neutrinos
• The Deuteron Confronts Big Bang Nucleosynthesis
• Neutrinos in Cosmology
• Neutrino Properties

Cited by in corpus (33)

• Probing Large Extra Dimensions with Neutrinos
• Probing oscillations into sterile neutrinos with cosmology, astrophysics and experiments
• BBN bounds on active-sterile neutrino mixing
• Variations on Four-Neutrino Oscillations
• Thermalisation of sterile neutrinos in the early Universe in the 3+1 scheme with full mixing matrix
• Sterile neutrinos, lepton asymmetries, primordial elements: how much of each?
• Ultra high energy neutrinos from hidden-sector topological defects
• Light sterile neutrino production in the early universe with dynamical neutrino asymmetries
• Neutrino Mixing, CP/T Violation and Textures in Four-Neutrino Models
• New constraints on neutrino physics from Boomerang data
• Neutrino Propagation in Dense Astrophysical Systems
• Neutrino oscillations in the early universe: How large lepton asymmetry can be generated?
• Probing secret interactions of eV-scale sterile neutrinos with the diffuse supernova neutrino background
• Relic neutrino asymmetries and big bang nucleosynthesis in a four neutrino model
• Neutrino degeneracy effect on neutrino oscillations and primordial helium yield
• Light Sterile Neutrino from extra dimensions and Four-Neutrino Solutions to Neutrino Anomalies
• Cosmological nucleosynthesis and active-sterile neutrino oscillations with small mass differences: The resonant case
• Viable secret neutrino interactions with ultralight dark matter
• Imprint of Sterile Neutrinos in the Cosmic Microwave Background Radiation
• Big bang nucleosynthesis constraints on bulk neutrinos
• Varying leptonic chemical potentials and spatial variation of primordial deuterium at high z
• Neutrino Spectrum Distortion Due to Oscillations and its BBN Effect
• Relaxed constraints on neutrino oscillation parameters
• Detailed study of BBN implications of neutrino oscillation generated neutrino asymmetries in some four neutrino models
• Oscillations and evolution of a hot and dense gas of flavor neutrinos: a quantum field theory study
• More General BBN Constraints on Neutrino Oscillations Parameters - Relaxed or Strengthened
• Restrictions on neutrino oscillations from BBN. Non-resonant case
• Overproduction of primordial helium-4 in the presence of neutrino oscillations
• Neutrino Oscillations and the Early Universe
• Alternative Solutions to Big Bang Nucleosynthesis
• Calculation of primordial abundances of light nuclei including a heavy sterile neutrino
• On the Origin of the Circular and Hexagonal Formations in Galaxies
• Asymmetric neutrino Yukawa matrices and neutrino mixing