Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Consistency of the Ladder Approximation and the Rainbow
  Approximation of Dyson-Schwinger Equation of QCD   We study the consistency of the ladder approximation and the rainbow
approximation of the Dyson-Schwinger equation of QCD. By considering the
non-Abelian property of QCD, we show that the QED-type Ward-Takahashi identity
is not required for the rainbow-ladder approximation of QCD. It indicates that
there does not exists any internal inconsistency in the usual rainbow-ladder
approximation of QCD. In addition, we propose an modified ladder approximation
which guarantees the Slavnov-Taylor identity for the quark-gluon vertex
omitting the ghost effect in the approximation.

11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics