1998/05/19 by J. Lopez-Suarez, J. López-Suárez, Lopez-Suarez, J. +2
Computer Science · Physics and Astronomy · #Astrophysics (astro-ph) #Computational Physics and Python Applications #Cosmology and Gravitation Theories #FOS: Physical sciences #Particle physics theoretical and experimental studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9805257
4 pages, latex, including 1 figure. Summary of a talk given at the Ninth Nuclear Astrophysics Workshop (Ringberg Castle, March 23-27, 1998). To appear as MPA publication. Corrected some typos
openalex publication_date 1998/05/19 · arxiv created 1998/05/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present a model for big bang nucleosynthesis which combines baryon inhomogeneities with the effects of the decays of massive particles (masses higher than a few GeV). Those particles, with half-lives longer than the standard nucleosynthesis epoch, give rise to both electromagnetic and hadron cascades which modify the abundances of the light nuclides resulting from the previous, inhomogeneous thermonuclear nucleosynthesis stage. We find a region in the parameter space of this composite model where there is agreement with currently inferred primordial abundances for values of Ωbh250 as high as 0.35 (Ωb being the baryon fraction of the closure density and h50 the Hubble constant in units of 50 km/s/Mpc). Possible improvements of the model are pointed out.