2001/02/09 by D. Kirilova, Daniela Kirilova, M. V. Chizhov +1 · 1 citation
Physics and Astronomy · #Cosmology and Gravitation Theories #Neutrino Physics Research #Particle physics theoretical and experimental studies #astro-ph #hep-ph
paper · pdf · doi:10.1016/s0920-5632(01)01473-6
published as Nucl.Phys.Proc.Suppl. 100 (2001) 360-362 · 4 pages, 3 eps figures included, espcrc2.sty, talk at NOW2000 Workshop, 11-16 September 2000, Otranto, Italy, to be published in Nucl. Phys. B Suppl
arxiv created 2001/02/09 · openalex publication_date 2001/05/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We discuss the oscillations effects on neutrinos in the early Universe and update the cosmological constraints on the oscillation parameters. It is shown that sterile LOW solution to the solar neutrino problem is almost completely excluded from cosmological nucleosynthesis considerations. Two possibilities for the relaxation of this constraint are discussed: high primordial helium-4 yield and a relic lepton asymmetry present at nucleosynthesis epoch. The numerical analysis proved that Yp=0.25 only relaxes the constraint on LOW solution, while L > 10-5 is capable to remove it.