Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fine-tuning carbon-based life in the universe by the triple-alpha
  process in red giants   Through the triple-alpha process occurring in red giant stars the bulk of the
carbon existing in our universe is produced. We calculated the change of the
triple-alpha reaction rate for slight variations of the nucleon-nucleon force
using a microscopic 12-body model. Stellar model calculations for a low-mass,
intermediate-mass and massive star using the different triple-alpha reaction
rates obtained with different strengths of the N-N interaction have been
performed. Even with a change of 0.4% in the strength of N-N force,
carbon-based life appears to be impossible, since all the stars then would
produce either almost solely carbon or oxygen, but could not produce both
elements.

14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph