Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Precision Big Bang Nucleosynthesis with the New Code PRIMAT   Precision on primordial abundances, deduced from observations, have now
reached the percent level for 4He and deuterium. Precision on big bang
nucleosynthesis (BBN) predictions should, hence, reach the same level. The
uncertainty on the 4He mass fraction is strongly affected by theoretical
uncertainties on the weak reaction rates that interconvert neutrons with
protons. All these corrections have been calculated in a self-consistent manner
and implemented in a new, and public, Mathematica code PRIMAT, together with an
extensive data base of reaction rates. Both can be obtained at
http://www2.iap.fr/users/pitrou/primat.htm.

29
The categories of this paper are: funct-an
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc