Constraining neutrino physics with BBN and CMBR

Abstract

We perform a likelihood analysis of the recent results on the anisotropy of Cosmic Microwave Background Radiation from the BOOMERanG and DASI experiments to show that they single out an effective number of neutrinos in good agreement with standard Big Bang Nucleosynthesis. We also consider degenerate Big Bang Nucleosynthesis to provide new bounds on effective relativistic degrees of freedom $N_{\nu }$ and, in particular, on neutrino chemical potential ${\xi }_{\alpha }$. When including Supernova Ia data we find, at $2\sigma$, $N_{\nu }\le 7$ and $-0.01\le {\xi }_e\le 0.22$, $|{\xi }_{\mu ,\tau }|\le 2.6$.

6 pages, 3 figures, some reference added

References in corpus (31)

• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• A Flat Universe from High-Resolution Maps of the Cosmic Microwave Background Radiation
• Cosmology from Maxima-1, Boomerang and COBE/DMR CMB Observations
• Big-Bang Nucleosynthesis Predictions for Precision Cosmology
• First Estimations of Cosmological Parameters From BOOMERANG
• The Deuterium to Hydrogen Abundance Ratio Towards a Fourth QSO: HS0105+1619
• Primordial Lithium and Big Bang Nucleosynthesis
• Nonequilibrium Corrections to the Spectra of Massless Neutrinos in the Early Universe
• Global three-neutrino oscillation analysis of neutrino data
• Towards a refined cosmic concordance model: joint 11-parameter constraints from CMB and large-scale structure
• Early-universe constraints on a time-varying fine structure constant
• New CMB constraints on the cosmic matter budget: trouble for nucleosynthesis?
• Big bang nucleosynthesis limit on N_nu
• Cosmological implications of a Relic Neutrino Asymmetry
• Non equilibrium spectra of degenerate relic neutrinos
• Generation of Large Lepton Asymmetries
• How Does CMB + BBN Constrain New Physics?
• The Small Observed Baryon Asymmetry from a Large Lepton Asymmetry
• Nonequilibrium Corrections to the Spectra of Massless Neutrinos in the Early Universe - Addendum
• Naturally Large Cosmological Neutrino Asymmetries in the MSSM
• New constraints on neutrino physics from Boomerang data
• Testing Standard and Degenerate Big Bang Nucleosynthesis with BOOMERanG and MAXIMA-1
• Remarks on the Boomerang results, the baryon density and the leptonic asymmetry
• The standard and degenerate primordial nucleosynthesis versus recent experimental data
• New CMBR data and the cosmic neutrino background
• Boomerang returns unexpectedly
• Big Bang Nucleosynthesis: an accurate determination of light element yields
• Precision Cosmology and the Density of Baryons in the Universe
• Active-Sterile neutrino oscillations and BBN+CMBR constraints
• Decaying neutrino and a high cosmological baryon density
• Impact of massive tau-neutrinos on primordial nucleosynthesis. Exact calculations

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