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Neutrino Mass and Dark Energy from Weak Lensing
Kevork Abazajian, Scott Dodelson
Weak gravitational lensing of background galaxies by intervening matter directly probes the mass distribution in the universe. This distribution, and its evolution at late times, i…
Telling Three from Four Neutrinos with Cosmology
Kevork N. Abazajian
New results, namely the independent determination of the deuterium abundance in several quasar absorption systems, and the complementary determination of the cosmological baryon de…
Bulk QCD Thermodynamics and Sterile Neutrino Dark Matter
Kevork N. Abazajian, George M. Fuller
We point out that the relic densities of singlet (sterile) neutrinos of interest in viable warm and cold dark matter scenarios, depend on the characteristics of the QCD transition…
Stringent Constraints on Cosmological Neutrino-Antineutrino Asymmetries from Synchronized Flavor Transformation
Kevork N. Abazajian, John F. Beacom, Nicole F. Bell
We assess a mechanism which can transform neutrino-antineutrino asymmetries between flavors in the early universe, and confirm that such transformation is unavoidable in the near b…