Physics
Scientific paper
Nov 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000ign..confe..56s&link_type=abstract
Ionized Gaseous Nebulae. Mexico City November 21- 24, 2000, meeting abstract
Physics
Scientific paper
Primordial nucleosynthesis provides a probe of the universal abundance of baryons (nucleons relative to CMB photons) when the Universe was only a few minutes old. Recent observations of anisotropy in the cosmic background radiation (CMB) measure the baryon abundance when the Universe was several hundred thousand years old. The general agreement between the two measurements represents an impressive confirmation of the standard model of Cosmology. However, as cosmology enters a more mature, precision era, there is a hint that these two determinations may not be in perfect agreement. If this "tension" between big bang nucleosynthesis (BBN) and the CMB persists, the standard model of cosmology may need to be modified. I will describe how an asymmetry between neutrinos and antineutrinos ("neutrino degeneracy") has the potential for resolving the (potential) conflict between BBN and the CMB.
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