Relic neutrino decoupling with flavour oscillations revisited

Abstract

We study the decoupling process of neutrinos in the early universe in the presence of three-flavour oscillations. The evolution of the neutrino spectra is found by solving the corresponding momentum-dependent kinetic equations for the neutrino density matrix, including for the first time the proper collision integrals for both diagonal and off-diagonal elements. This improved calculation modifies the evolution of the off-diagonal elements of the neutrino density matrix and changes the deviation from equilibrium of the frozen neutrino spectra. However, it does not vary the contribution of neutrinos to the cosmological energy density in the form of radiation, usually expressed in terms of the effective number of neutrinos, N_eff. We find a value of N_eff=3.045, in agreement with previous theoretical calculations and consistent with the latest analysis of Planck data. This result does not depend on the ordering of neutrino masses. We also consider the effect of non-standard neutrino-electron interactions (NSI), predicted in many theoretical models where neutrinos acquire mass. For two sets of NSI parameters allowed by present data, we find that N_eff can be reduced down to 3.040 or enhanced up to 3.059.

19 pages, 6 figures

References in corpus (5)

• Neutrino oscillations refitted
• Constraining Nonstandard Neutrino-Electron Interactions
• Effects of non-standard neutrino-electron interactions on relic neutrino decoupling
• Cosmological lepton asymmetry with a nonzero mixing angle θ_{13}
• Relic Neutrino Freeze-out: Dependence on Natural Constants

Cited by in corpus (143)

• In the Realm of the Hubble tension $-$ a Review of Solutions
• Challenges for $\Lambda$CDM: An update
• Cosmology Intertwined II: The Hubble Constant Tension
• Towards a precision calculation of $N_{\mathrm{eff}}$ in the Standard Model II: Neutrino decoupling in the presence of flavour oscillations and finite-temperature QED
• Neutrino decoupling including flavour oscillations and primordial nucleosynthesis
• A precision calculation of relic neutrino decoupling
• Cosmology With a Very Light $L_{\mu }-L_{\tau }$ Gauge Boson
• On Effective Degrees of Freedom in the Early Universe
• DESI 2024 VII: Cosmological Constraints from the Full-Shape Modeling of Clustering Measurements
• Muonic Boson Limits: Supernova Redux
• Refined Bounds on MeV-scale Thermal Dark Sectors from BBN and the CMB
• Primordial gravitational waves from NANOGrav: a broken power-law approach
• A new tension in the cosmological model from primordial deuterium?
• Interacting radiation after Planck and its implications for the Hubble Tension
• Thermalisation of sterile neutrinos in the early Universe in the 3+1 scheme with full mixing matrix
• Improving Helium Abundance Determinations with Leo P as a Case Study
• Primordial Deuterium after LUNA: concordances and error budget
• BBN constraints on the annihilation of MeV-scale dark matter
• First-order Phase Transition interpretation of PTA signal produces solar-mass Black Holes
• A change of direction in pairwise neutrino conversion physics: The effect of collisions
• Dark matter and dark radiation from evaporating Kerr primordial black holes
• Revealing the effects of curvature on the cosmological models
• Dirac neutrinos and $N_{\mathrm{eff}}$
• Long Range Interactions in Cosmology: Implications for Neutrinos
• Precise WIMP Dark Matter Abundance and Standard Model Thermodynamics
• Testing spatial curvature and anisotropic expansion on top of the $\Lambda$CDM model
• Invisible neutrino decay in precision cosmology
• Evaporation of Primordial Black Holes in the Early Universe: Mass and Spin Distributions
• Dirac neutrinos and $N_{\mathrm{eff}}$ II: the freeze-in case
• Health checkup test of the standard cosmological model in view of recent Cosmic Microwave Background Anisotropies experiments
• New cosmological bounds on hot relics: Axions $\&$ Neutrinos
• Novel cosmological bounds on thermally-produced axion-like particles
• Thermalization of large energy release in the early Universe
• Gravitational Wave from Graviton Bremsstrahlung during Reheating
• Cosmological Constraints on Light (but Massive) Relics
• Towards a precision calculation of $N_{\mathrm{eff}}$ in the Standard Model III: Improved estimate of NLO contributions to the collision integral
• Dynamics of fast neutrino flavor conversions with scattering effects: a detailed analysis
• Redshift Effects in Particle Production from Kerr Primordial Black Holes
• Resurrection of large lepton number asymmetries from neutrino flavor oscillations
• Bounds on neutrino-scalar nonstandard interactions from big bang nucleosynthesis
• Bayesian evidence for the tensor-to-scalar ratio $r$ and neutrino masses $m_{\nu }$: Effects of uniform vs logarithmic priors
• Distinguishing between Neutrinos and time-varying Dark Energy through Cosmic Time
• How to relax the cosmological neutrino mass bound
• Strengthening the bound on the mass of the lightest neutrino with terrestrial and cosmological experiments
• Neutrino non-standard interactions meet precision measurements of $N_{\mathrm{eff}}$
• Cosmic Neutrino Background Detection in Large-Neutrino-Mass Cosmologies
• Light Dirac neutrino portal dark matter with observable $\Delta N_{\mathrm{eff}}$
• Primordial neutrino asymmetry evolution with full mean-field effects and collisions
• Quantifying the global "CMB tension" between the Atacama Cosmology Telescope and the Planck satellite in extended models of cosmology
• Neutrino flavor transformation in the lepton-asymmetric universe
• The Interplay between the Dark Matter Axion and Primordial Black Holes
• Dark radiation constraints on portal interactions with hidden sectors
• Towards a reliable calculation of relic radiation from primordial gravitational waves
• Neutrino Properties with Ground-Based Millimeter-Wavelength Line Intensity Mapping
• Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies
• Testing Predictions of the Quantum Landscape Multiverse 2: The Exponential Inflationary Potential
• Testing Predictions of the Quantum Landscape Multiverse 1: The Starobinsky Inflationary Potential
• Neutrino clustering in the Milky Way and beyond
• Measuring Inflaton Couplings via Primordial Gravitational Waves
• Neutrino Magnetic Moments Meet Precision $N_{\mathrm{eff}}$ Measurements
• Massive neutrino self-interactions with a light mediator in cosmology
• Implications for primordial black holes from cosmological constraints on scalar-induced gravitational wave
• Constraints on primordial lepton asymmetries with full neutrino transport
• Lepton asymmetry, neutrino spectral distortions, and big bang nucleosynthesis
• Incomplete neutrino decoupling effect on big bang nucleosynthesis
• Parity Violation and Chiral Oscillation of Cosmological Relic Neutrinos
• Resolving the Hubble tension in a U(1)${}_{L_{\mu }-L_{\tau }}$ model with Majoron
• Observing Left-Right Symmetry in the Cosmic Microwave Background
• Analyzing the Hubble tension through hidden sector dynamics in the early universe
• Low scale Dirac leptogenesis and dark matter with observable $\Delta N_{\mathrm{eff}}$
• Clarifying transfer function approximations for the large-scale gravitational wave background in $\Lambda$CDM
• Towards a full description of MeV dark matter decoupling: a self-consistent determination of relic abundance and $N_{\mathrm{eff}}$
• Freeze-in Dark Matter via Light Dirac Neutrino Portal
• Cosmological Constraints on Dark Scalar
• A testable hidden-sector model for Dark Matter and neutrino masses
• Concealing Dirac neutrinos from cosmic microwave background
• Connecting the Extremes: A Story of Supermassive Black Holes and Ultralight Dark Matter
• Long lived inert Higgs in fast expanding universe and its imprint on cosmic microwave background
• Diraxiogenesis
• Effects of the QCD Equation of State and Lepton Asymmetry on Primordial Gravitational Waves
• Cosmological radiation density with non-standard neutrino-electron interactions
• Insights into neutrino decoupling gleaned from considerations of the role of electron mass
• Effect of collisions on neutrino flavor inhomogeneity in a dense neutrino gas
• Current constraints on cosmological scenarios with very low reheating temperatures
• Simple estimate of BBN sensitivity to light freeze-in dark matter
• Dark Matter and $(g-2{)}_{\mu ,e}$ in radiative Dirac neutrino mass models
• Asymmetric dark matter with a spontaneously broken $U(1{)}^{\prime }$: self-interaction and gravitational waves
• Testing Dirac leptogenesis with the cosmic microwave background and proton decay
• CMB signature of non-thermal Dark Matter produced from self-interacting dark sector
• Big Bang Nucleosynthesis Limits and Relic Gravitational Waves Detection Prospects
• Constraints from High-Precision Measurements of the Cosmic Microwave Background: The Case of Disintegrating Dark Matter with $\Lambda$ or Dynamical Dark Energy
• A review of neutrino decoupling from the early universe to the current universe
• Neutrino flavor mixing breaks isotropy in the early universe
• Collider and CMB complementarity of leptophilic dark matter with light Dirac neutrinos
• Big bang nucleosynthesis and early dark energy in light of the EMPRESS $Y_p$ results and the $H_0$ tension
• Precise Capture Rates of Cosmic Neutrinos and Their Implications on Cosmology
• Variation of the fine structure constant in the light of recent helium abundance measurement
• Effective neutrino number shift from keV-vacuum neutrinophilic 2HDM
• Constraining Holographic Dark Energy and Analyzing Cosmological Tensions
• S.M.A.S.H.E.D.: Standard Model Axion Seesaw Higgs Inflation Extended for Dirac Neutrinos
• Inflaton-driven early dark energy
• Lepton Flavor Asymmetries: from the early Universe to BBN
• Freeze-In of radiative keV-scale neutrino dark matter from a new $\text{U}(1{)}_{\text{B-L}}$
• Probing dark photons in the early universe with big bang nucleosynthesis
• Self-interacting neutrinos, the Hubble parameter tension, and the Cosmic Microwave Background
• Light cold dark matter from non-thermal decay
• Measuring inflaton couplings via dark radiation as $\Delta N_{\mathrm{eff}}$ in CMB
• Dark Sector extensions of the Littlest Seesaw in the presence of Primordial Black Holes
• Strong cosmological constraints on the neutrino magnetic moment
• Prospects and Limitations for Constraining Light Relics with Primordial Abundance Measurements
• One Extension to Explain Them All, One Scale-Invariant Spectrum to Test Them All, and in One Model Bind Them
• Warm Hawking Relics From Primordial Black Hole Domination
• Early Dark Energy During Big Bang Nucleosynthesis
• Fast and Flexible Neutrino Decoupling Part I: The Standard Model
• Linking the $R_{K^{(\ast )}}$ anomalies to the Hubble tension via a single right-handed neutrino
• Reviewing the prospect of fermion triplets as dark matter and source of baryon asymmetry in non-standard cosmology
• A flexible parameterization to test early physics solutions to the Hubble tension with future CMB data
• Dark Radiation in Spectator Axion-Gauge Models
• Using $\Delta N_{\mathrm{eff}}$ to constrain preferred axion model dark matter
• Cosmology with Independently Varying Neutrino Temperature and Number
• High-Precision Measurement of D($\gamma$, $n$)$p$ Photodisintegration Reaction and Implications for Big-Bang Nucleosynthesis
• Scale and redshift dependent limits on cosmic neutrino properties
• Dark Matter and Neutrino Masses in a Portalino-like Model
• Improving CMB constraints on early Universe physics with LSS: A multi-probe forecast including cross-covariance
• Precision calculation of $N_{\text{eff}}$ with Neutrino Direct Simulation Monte Carlo
• BBN Constraints on the Hadronic Annihilation of sub-GeV Dark Matter
• Precision calculation of neutrino evolution in the early Universe
• From Dark Radiation to Dark Energy: Unified Cosmological Evolution in K-essence Models
• An introduction to axions and their detection
• Constraining nonminimal f(T) gravity from Primordial Nucleosynthesis to Late-Universe observations
• Towards a precision calculation of $N_{\mathrm{eff}}$ in the Standard Model IV: Estimating the impact of positronium formation
• Asymmetric Mediator in Scotogenic Model
• Big Bang Nucleosynthesis as a probe of non-standard neutrino interactions and non-unitary three-neutrino mixing
• Big-Bang Nucleosynthesis on a bubble universe nucleated in Kerr-AdS${}_5$ Black Hole
• Phenomenology of Dirac neutrino EFTs up to dimension six
• Dissecting the $H_0$ and $S_8$ tensions with Planck + BAO + supernova type Ia in multi-parameter cosmologies
• Light Sterile Neutrinos in the Early Universe: Effects of Altered Dispersion Relations and a coupling to Axion-Like Dark Matter
• Cosmological perturbation theory with trinity of scalar fields
• Constraining Tsallis Corrections to Photon Reheating from Electron-Positron Annihilation: A Phenomenological Approach
• In-depth analysis of the clustering of dark matter particles around primordial black holes. Part III: CMB constraints
• Primordial helium-3 redux: The helium isotope ratio of the Orion nebula
• Cosmological Probes of Lepton Parity Freeze-in Dark Matter: $\Delta N_{\mathrm{eff}}$ & Gravitational Waves
• Cosmological radiation density with non-standard neutrino-electron interactions