Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Primordial Lithium Abundance in Catalyzed Big Bang Nucleosynthesis   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,
\tau_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.

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The categories of this paper are: comp-gas
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The categories of this paper are: chao-dyn
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The categories of this paper are: cond-mat
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The categories of this paper are: stat
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The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-alg
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The categories of this paper are: acc-phys
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The categories of this paper are: dg-ga
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The categories of this paper are: cs
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The categories of this paper are: math
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The categories of this paper are: chem-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: solv-int