Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hadronic light-by-light scattering contribution to the muon g-2   We briefly review the current status of the hadronic light-by-light
scattering correction to the muon g-2. Then we present our semi-analytical
evaluation of the pion-pole contribution, using a description of the
pion-photon-photon form factor based on large-N_C and short-distance properties
of QCD. We also sketch an effective field theory approach to hadronic
light-by-light scattering. In view of several still unsolved problems, our
conservative estimate for the full hadronic light-by-light scattering
contribution is a_{mu}(LbyL;had) = + 8 (4) x 10^{-10}.

24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph