Finite temperature effects on the neutrino decoupling in the early Universe

Abstract

Leading finite temperature effects on the neutrino decoupling temperature in the early Universe have been studied. We have incorporated modifications of the dispersion relation and the phase space distribution due to the presence of particles in the heat bath at temperature around MeV. Since both the expansion rate of the Universe and the interaction rate of a neutrino are reduced by finite temperature effects, it is necessary to calculate thermal corrections as precisely as possible in order to find the net effect on the neutrino decoupling temperature. We have performed such a calculation by using the finite temperature field theory. It has been shown that the finite temperature effects increase the neutrino decoupling temperature by 4.4%, the largest contribution coming from the modification of the phase space due to the thermal bath.

18 pages, LaTeX (uses RevTeX), 6 figures added as PS files, submitted to Phys.Rev.D

Cited by in corpus (50)

• Relic neutrino decoupling including flavour oscillations
• Neutrinos in cosmology
• Precision big bang nucleosynthesis with improved Helium-4 predictions
• Relic neutrino decoupling with flavour oscillations revisited
• Bounds on very low reheating scenarios after Planck
• 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
• A precision calculation of the effective number of cosmological neutrinos
• A precision calculation of relic neutrino decoupling
• Nuclear Reaction Network for Primordial Nucleosynthesis: a detailed analysis of rates, uncertainties and light nuclei yields
• Primordial gravitational waves, precisely: The role of thermodynamics in the Standard Model
• Cosmological Constraints on Theories with Large Extra Dimensions
• Precision Early Universe Thermodynamics made simple: $N_{\mathrm{eff}}$ and Neutrino Decoupling in the Standard Model and beyond
• Neutrino decoupling beyond the Standard Model: CMB constraints on the Dark Matter mass with a fast and precise $N_{\mathrm{eff}}$ evaluation
• Neutrino energy transport in weak decoupling and big bang nucleosynthesis
• Thermalisation of sterile neutrinos in the early Universe in the 3+1 scheme with full mixing matrix
• Towards a precision calculation of the effective number of neutrinos $N_{\mathrm{eff}}$ in the Standard Model I: The QED equation of state
• Effects of non-standard neutrino-electron interactions on relic neutrino decoupling
• Primordial Nucleosynthesis Constraints on Z' Properties
• Towards a precision calculation of $N_{\mathrm{eff}}$ in the Standard Model III: Improved estimate of NLO contributions to the collision integral
• Cosmological Constraint on Dark Photon from $N_{\mathrm{eff}}$
• Neutrino non-standard interactions meet precision measurements of $N_{\mathrm{eff}}$
• Cosmological Implications of Light Sterile Neutrinos produced after the QCD Phase Transition
• Scalar Dark Matter Candidates -- Revisited
• Lepton asymmetry, neutrino spectral distortions, and big bang nucleosynthesis
• Incomplete neutrino decoupling effect on big bang nucleosynthesis
• Consequences of neutrino self interactions for weak decoupling and big bang nucleosynthesis
• Towards a full description of MeV dark matter decoupling: a self-consistent determination of relic abundance and $N_{\mathrm{eff}}$
• Cosmological Constraints on Dark Scalar
• Insights into neutrino decoupling gleaned from considerations of the role of electron mass
• Ballistic Dark Matter oscillates above $\Lambda$CDM
• A short survey of matter-antimatter evolution in the primordial universe
• A review of neutrino decoupling from the early universe to the current universe
• Charged-Particle Decay at Finite Temperature
• Finite temperature effects on cosmological baryon diffusion and inhomogeneous Big-Bang nucleosynthesis
• Finite Temperature effects on baryon transport scattering in the early Universe
• How new physics affects primordial neutrinos decoupling: Direct Simulation Monte Carlo approach
• Probing dark photons in the early universe with big bang nucleosynthesis
• Dynamics of metastable Standard Model particles from long-lived particle decays in the MeV primordial plasma
• Cosmological Constraint on Vector Mediator of Neutrino-Electron Interaction in light of XENON1T Excess
• Dark Photon as Fractional Cosmic Neutrino Masquerader
• Fast and Flexible Neutrino Decoupling Part I: The Standard Model
• Cosmological constraints on light flavons
• Renormalization of QED near Decoupling Temperature
• $\Delta N_{\text{eff}}$ and entropy production from early-decaying gravitinos
• Propagation of Electromagnetic Waves in Extremely Dense Media
• Nucleosynthesis and CMB bounds on photophilic ALPs: a fresh look
• Towards a precision calculation of $N_{\mathrm{eff}}$ in the Standard Model IV: Estimating the impact of positronium formation
• Quarks to Cosmos: Particles and Plasma in Cosmological evolution
• The Universe at the MeV era: neutrino evolution and cosmological observables
• Thermal field theories coupled to curved spacetime