Big bang nucleosynthesis constraints on hadronically and electromagnetically decaying relic neutral particles
By K. Jedamzik. 2006
382 citations recorded by the source corpus.
Big bang nucleosynthesis in the presence of decaying relic neutral particles is examined in detail. All nonthermal processes important for the determination of light-element abundance yields of {sup 2}H, {sup 3}H, {sup 3}He, {sup 4}He, {sup 6}Li, and {sup 7}Li are coupled to the thermonuclear fusion reactions to obtain comparatively accurate results. Predicted light-element yields are compared to observationally inferred limits on primordial light-element abundances to infer constraints on the abundances and properties of relic decaying particles with decay times in the interval 0.01 sec(less-or-similar sign){tau}{sub X}(less-or-similar sign)10{sup 12} sec. Decaying particles are typically constrained at early times by {sup 4}He or {sup 2}H, at intermediate times by {sup 6}Li, and at large times by the {sup 3}He/{sup 2}H ratio. Constraints are shown for a large number of hadronic branching ratios and decaying particle masses and may be applied to constrain the evolution of the early universe.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/c18bdc01dfc7c1960fd4326e7388c0311d3dfb92
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In Nuclear and High Energy Physics
Citations in the corpus
- The landscape of QCD axion models (2020, neutral): “For τQ ∼ (10−2 ÷ 10) s the decays of superheavy quarks with mQ 1TeV would affect BBN [526–529].”
- Asymmetric dark matter from leptogenesis (2011, background): “This means that there are no new relativistic DOF present during BBN, and the only constraint from BBN is that the the lightest state in the hidden sector decays to the SM fast enough to avoid late dissociation processes [47, 48 ].”
- Freeze-in production of FIMP dark matter (2009, background): “The light element synthesis of 2H, 3He, 4He and 7Li (as well as 6Li) may change drastically when hadronically and electromagnetically interacting non-thermal particles are injected into the plasma [32], due to the decay of the metastable particles.”