2001/01/31 by Elina Sihvola · 8 citations
Physics and Astronomy · #Antimatter #Astrophysics #Baryogenesis #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #Lepton #Neutrino #Nuclear physics #Nucleosynthesis #Omega #Particle physics #Physics #Quantum mechanics #Supernova #Universe #astro-ph #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.1103/physrevd.63.103001
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 63(10) (American Physical Society) · 9 pages, PRD version, ref. 6 corrected
arxiv created 2001/03/27 · openalex publication_date 2001/04/09 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Production of regions of antimatter in the early universe is predicted in many baryogenesis models. Small scale antimatter regions would annihilate during or soon after nucleosynthesis, affecting the abundances of the light elements. In this paper we study how the acceptable range in \ensuremathΩb changes in the presence of antimatter regions, as compared to the standard big bang nucleosynthesis. It turns out that it is possible to produce at the same time both a low 4He value (Yp<0.240) and a low D/H value (D/H<4\ifmmode×\else\texttimes\fi10^\ensuremath-5), but overproduction of 7Li is unavoidable at large \ensuremathΩb.