Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hadronic light-by-light scattering in the muon g-2: a Dyson-Schwinger
  equation approach   We determine the hadronic light-by-light scattering contribution to the
anomalous magnetic moment of the muon using the framework of Dyson-Schwinger
and Bethe-Salpeter equations of QCD. Our result for the pseudoscalar ($\pi^0,
\eta, \eta'$) meson exchange diagram is commensurate with previous
calculations. In our calculation of the quark loop contribution we improve
previous approaches by implementing constraints due to gauge invariance. As a
consequence, our value $a_\mu^{\textrm{LBL;quarkloop}} = (136 \pm 59)\times
10^{-11}$ is significantly larger. Taken at face value, this then leads to a
revised estimate of the total $a_\mu=116\,591\,891.0(105.0)\times 10^{-11}$.

8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess