Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum three-body calculation of the nonresonant triple-\alpha reaction
  rate at low temperatures   The triple-\alpha reaction rate is re-evaluated by directly solving the
three-body Schr\"odinger equation. The resonant and nonresonant processes are
treated on the same footing using the continuum-discretized coupled-channels
method for three-body scattering. Accurate description of the \alpha-\alpha
nonresonant states significantly quenches the Coulomb barrier between the
two-\alpha's and the third \alpha particle. Consequently, the \alpha-\alpha
nonresonant continuum states below the resonance at 92.04 keV, i.e., the ground
state of 8Be, give markedly larger contribution at low temperatures than in
foregoing studies. We show that Nomoto's method for three-body nonresonant
capture processes, which is adopted in the NACRE compilation and many other
studies, is a crude approximation of the accurate quantum three-body model
calculation. We find about 20 orders-of-magnitude enhancement of the
triple-\alpha reaction rate around 10^7 K compared to the rate of NACRE.

5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs