Primordial Lithium Abundance in Catalyzed Big Bang Nucleosynthesis
| dc.creator | Bird, Chris | |
| dc.creator | Koopmans, Kristen | |
| dc.creator | Pospelov, Maxim | |
| dc.date | 2007-03-08 | |
| dc.date | 2008-05-19 | |
| dc.date.accessioned | 2026-07-07T11:59:12Z | |
| dc.date.available | 2026-07-07T11:59:12Z | |
| dc.description | There exists a well known problem with the Li7+Be7 abundance predicted by standard big bang nucleosynthesis being larger than the value observed in population II stars. The catalysis of big bang nucleosynthesis by metastable, τ_X \ge 10^3 sec, charged particles X^- is capable of suppressing the primordial Li7+Be7, abundance and making it consistent with the observations. We show that to produce the correct abundance, this mechanism of suppression places a requirement on the initial abundance of X^- at temperatures of 4\times 10^8 K to be on the order of or larger than 0.02 per baryon, which is within the natural range of abundances in models with metastable electroweak-scale particles. The suppression of Li7+Be7, is triggered by the formation of (Be7X^-), compound nuclei, with fast depletion of their abundances by catalyzed proton reactions, and in some models by direct capture of X^- on Be7. The combination of Li7+Be7 and Li6 constraints favours the window of lifetimes, 1000s \la tau_X \leq 2000 s. | |
| dc.description | 24 pages, 13 eps figures; additional discussion of resonant recombination added | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0703096 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0703096 | |
| dc.identifier | Phys.Rev.D78:083010,2008 | |
| dc.identifier | doi:10.1103/PhysRevD.78.083010 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/206481 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Primordial Lithium Abundance in Catalyzed Big Bang Nucleosynthesis | |
| dc.type | text |