Monday, Jan 09, 2012, 8:30 AM - 9:20 AM
The CMB and Neutrinos
Massive neutrinos affect the temperature and polarization power spectra of the cosmic microwave background (CMB). The generation of CMB measurements now underway has the sensitivity to constrain the sum of neutrino masses to the 0.05 to 0.1 eV level assuming that they are the dominant massive relativistic particles in the early universe. Measurements of the atmospheric neutrino oscillations indicate that at least one neutrino species has a mass above 0.06 eV. Thus, in the context of the LCDM model of cosmology, we should be able to determine the neutrino mass sum through the neutrino's participation in cosmic evolution. After a brief overview of the LCDM model, we present results from current measurements of the CMB and then indicate the path toward constraining the neutrino mass with an emphasis on lensing the CMB.
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