5 papers
Transformation-Induced Nonthermal Neutrino Spectra and Primordial Nucleosynthesis
Kevork Abazajian, Xiangdong Shi, George M. Fuller
We examine in detail the changes in the production of primordial helium resulting from nonthermal neutrino momentum distributions produced by resonant transformation of electron-ty…
Comments Regarding "On Neutrino-Mixing-Generated Lepton Asymmetry and the Primordial Helium-4 Abundance"
Xiangdong Shi, George M. Fuller, Kevork Abazajian
This is a reply to the preprint "On Neutrino-Mixing-Generated Lepton Asymmetry and the Primordial Helium-4 Abundance" by M. V. Chizhov and D. P. Kirilova (hep-ph/9908525), which cr…
Active-Sterile Neutrino Mixing in the Early Universe and Primordial Nucleosynthesis
Kevork Abazajian, Xiangdong Shi, George M. Fuller
We investigate the effects of matter-enhanced (MSW) transformation of neutrinos in the Early Universe on the primordial helium yield (Y_p). We find that Y_p is affected much more b…
Baryon/anti-baryon inhomogeneity and big bang nucleosynthesis
Kevork Abazajian, George M. Fuller
We investigate the effects of baryon/anti-baryon inhomogeneity on primordial nucleosynthesis. Recent work claims that electroweak baryogenesis could give rise to distinct regions o…
Are Gamma-Ray Bursts Signals of Supermassive Black Hole Formation?
Kevork Abazajian, George M. Fuller, Xiangdong Shi
The formation of supermassive black holes through the gravitational collapse of supermassive objects ($M \ga 10^4 M_\odot$) has been proposed as a source of cosmological gamma-ray…