Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quark-hadron duality for $K^0-\bar{K^0}$ mixing   Long distance contribution to the $K^0-\bar K^0$ mixing is taken into account
consistently and the corrections to the naive duality result represented by the
famous box diagram are found to be small. Estimates are given in the leading
order of the chiral perturbation theory.

3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat