Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nucleosynthesis in slowly evolving Cosmologies   We explore aspects of Cosmological Nucleosynthesis in an FRW universe in
which the scale factor evolves linearly with time: $a(t) \sim t$. A high Lepton
number density during the period when significant nucleosynthesis takes place
would lead to a dominant screening of the Coulomb potential of colliding
nucleii. This would lead to a significant enhancement of nucleosynthesis rates.
We demonstrate how adequate amount of $^4He$ and a collataral metallicity,
close to the lowest metallicity observed in metal poor Pop II stars and clouds,
can be produced with such an evolution.

16
The categories of this paper are: stat
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex