Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nuclear forces from chiral Lagrangians using the method of unitary
  transformation I: Formalism   We construct the two- and three-nucleon potential based on the most general
chiral effective pion-nucleon Lagrangian using the method of unitary
transformations. For that, we develop a power counting scheme consistent with
this projection formalism. In contrast to previous results obtained in
old-fashioned time-ordered perturbation theory, the method employed leads to
energy-independent potentials. We discuss in detail the similarities and
differences to the existing chiral nucleon-nucleon potentials. We also show
that to leading order in the power counting, the three-nucleon forces vanish
lending credit to the result obtained by Weinberg using old-fashioned
time-ordered perturbation theory.

16
The categories of this paper are: stat
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
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
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin