Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Status of CP violation in Kaon systems   CP violation is an important tool to test the Standard Model and his
extensions. We describe kaon physics observables testing CP violation and more
in general short distance physics. Channels under consideration will be K -> pi
nu nu, K -> pi l+ l-, K+- -> 3 pi, K+- -> pi +- pi gamma and K+- -> pi +- pi0
e+ e-

12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat