2005/11/30 by Baojiu Li, M. C. Chu, Ming-Chung Chu · 1 citation
Physics and Astronomy · #Anisotropy #Astrophysics #Big Bang (financial markets) #Big Bang nucleosynthesis #Black Holes and Theoretical Physics #Brane #Cosmic microwave background #Cosmology and Gravitation Theories #Extra dimensions #Fermion #Nucleosynthesis #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum mechanics #Supernova #Theoretical physics #Universe #astro-ph
paper · pdf · doi:10.1103/physrevd.73.023509
published as Phys.Rev.D73:023509,2006 · 10 pages, 5 figures; Comments and references added; Version accepted for publication in Physical Review D
arxiv created 2005/12/29 · openalex publication_date 2006/01/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We consider the big-bang nucleosynthesis (BBN) in the brane world scenario, where all matter fields are confined on our 3-brane and the radion of the Brane evolves cosmologically. In the Einstein frame fundamental fermion masses vary and the results of standard BBN (SBBN) are modified. We can thus use the observational primordial element abundances to impose constraints on the possible variations of the radion. The possibility of using the evolving radion to resolve the discrepancies between the Wilkinson Microwave Anisotropy Probe and SBBN values of the baryon-to-photon ratio (\ensuremathη) is also discussed. The results and constraints presented here are applicable to other models in which fundamental fermion masses vary.