Testing Standard and Degenerate Big Bang Nucleosynthesis with BOOMERanG and MAXIMA-1

Abstract

We test different Big Bang Nucleosynthesis scenarios using the recent results on the Cosmic Microwave Background Anisotropies provided by the BOOMERanG and MAXIMA-1 experiments versus the observed abundances of 4He, D and 7Li. The likelihood analysis, based on Bayesian approach, shows that, in the case of high deuterium abundance, Y_D=(2.0\pm0.5) 10^{-4}, both standard and degenerate BBN are inconsistent with the CMBR measurement at more than 3 σ. Assuming low deuterium abundance, Y_D=(3.4\pm0.3) 10^{-5}, the standard BBN model is still inconsistent with present observations at 2 σlevel, while the degenerate BBN results to be compatible. Unless systematics effects will be found in nuclide abundances and/or in CMBR data analysis this result may be a signal in favour of new physics like a large chemical potential of the relic neutrino-antineutrino background.

arXiv comment4 pages, RevTeX, 2 figures .eps. Some typos corrected, figure 1 improved

References in corpus (27)

• Efficient Computation of CMB anisotropies in closed FRW models
• A Flat Universe from High-Resolution Maps of the Cosmic Microwave Background Radiation
• A Line of Sight Approach to Cosmic Microwave Background Anisotropies
• A New Calculation of the Recombination Epoch
• The Deuterium Abundance Towards Q1937-1009
• A Measurement of the Angular Power Spectrum of the CMB from l = 100 to 400
• First Estimations of Cosmological Parameters From BOOMERANG
• Radical Compression of Cosmic Microwave Background Data
• The primordial lithium abundance
• The Effect of Physical Assumptions on the Calculation of Microwave Background Anisotropies
• A measurement of Omega from the North American test flight of BOOMERANG
• On the Abundance of Primordial Helium
• A High Deuterium Abundance at z=0.7
• Precision Prediction for the Big-Bang Abundance of Primordial Helium
• Measurement of a Peak in the Cosmic Microwave Background Power Spectrum from the North American test flight of BOOMERANG
• Dark Energy and the CMB
• 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
• Characterizing the Peak in the CMB Angular Power Spectrum
• New Constraints on inflation from the Cosmic Microwave Background
• New constraints on neutrino physics from Boomerang data
• Measuring the cosmological lepton asymmetry through the CMB anisotropy
• The standard and degenerate primordial nucleosynthesis versus recent experimental data
• Remarks on the Boomerang results, the baryon density and the leptonic asymmetry
• Precision Rates for Nucleon Weak Interactions in Primordial Nucleosynthesis and He-4 Abundance
• Big Bang Nucleosynthesis: an accurate determination of light element yields

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