4 papers
Formation of Disk Galaxies: Warm Dark Matter and the Angular Momentum problem
Jesper Sommer-Larsen, Alexandre Dolgov
We have performed TreeSPH simulations of disk galaxy formation in various warm dark matter (WDM) cosmologies. Our results indicate that for a range of WDM free-streaming masses, th…
Impact of massive tau-neutrinos on primordial nucleosynthesis. Exact calculations
A. D. Dolgov, S. H. Hansen, D. V. Semikoz
The influence of a massive Majorana tau-neutrino on primordial nucleosynthesis is rigorously calculated. The system of three integro-differential kinetic equations is solved numeri…
Baryogenesis During Reheating in Natural Inflation and Comments on Spontaneous Baryogenesis
Alexandre Dolgov, Katherine Freese, Raghavan Rangarajan +1
We calculate the baryon asymmetry created by the decay of a pseudo Nambu-Goldstone boson whose interactions violate baryon number conservation. Our results are in disagreement with…
Calculation of Particle Production by Nambu Goldstone Bosons with Application to Inflation Reheating and Baryogenesis
Alexandre Dolgov, Katherine Freese
A semiclassical calculation of particle production by a scalar field in a potential is performed. We focus on the particular case of production of fermions by a Nambu-Goldstone bos…