Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A two-pion exchange three-nucleon force based on a realistic pi-N
  interaction   The contribution of a $\pi \pi$-exchange three-body force to the
three-nucleon binding energy is calculated in terms of a $\pi N$ amplitude. The
latter is based on a meson-theoretical model of $\pi N$ interaction developed
by the J\"ulich group. Similar to a previous study based on simple
phenomenological $\pi N$ potentials a very small effect of the resulting
three-body force is found. Possible origins of the two-orders-of-magnitude
descrepancy between the present result and the values obtained for the
Tucson-Melbourne three-body force are investigated. Evidence is provided that
this discrepancy is most likely due to strikingly different off-shell
properties of the $\pi N$ amplitudes underlying the two approaches.

1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th