Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: KL to pi0 e+ e- and KL to pi0 mu+ mu- : A binary star on the stage of
  flavor physics   A systematic analysis of New Physics impacts on the rare decays KL to pi0 l+
l- is performed. Thanks to their different sensitivities to flavor-changing
local effective interactions, these two modes could provide valuable
information on the nature of the possible New Physics at play. In particular, a
combined measurement of both modes could disentangle scalar/pseudoscalar from
vector or axial-vector contributions. For the latter, model-independent bounds
are derived. Finally, the KL to pi0 mu+ mu- forward-backward CP-asymmetry is
considered, and shown to give interesting complementary information.

24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn