Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $\Delta S=1,2$ Effective Weak Chiral Lagrangian from the Instanton
  Vacuum   We study the effective weak chiral Lagrangian within the framework of the
instanton vacuum. We incorporate the $\Delta S=1,2$ effective weak Hamiltonian
into the effective low-energy QCD partition function defining the chiral
symmetric quark-Goldstone boson interactions with the momentum-dependent
dynamical quark mass. Employing the derivative expansion, we derive the
corresponding weak effective Lagrangian in leading order with the low energy
constants to be used e.g. in chiral perturbation theory. We find that the
momentum-dependent dynamical quark mass plays an essential role in improving
the low energy constants and their ratio $g_{8}/g_{27}$.

36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
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The categories of this paper are: eess
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
21
The categories of this paper are: adap-org