Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hadronic contribution to the muon g-2 from a Dyson-Schwinger perspective   A novel approach towards the hadronic contributions to the anomalous magnetic
moment of the muon $a_{\mu}$ is presented, namely the Dyson-Schwinger equations
of QCD. It has the advantage of being valid for all momentum scales and has the
potential to address off-shell amplitudes. We present our first results for the
pseudoscalar (PS) meson exchange and the quark loop contributions. The meson
exchange ($\pi^0, \eta, \eta'$), $a_\mu^{\textrm{LBL;PS}}=(84 \pm 13)\times
10^{-11}$, is commensurate with previous calculations, while the quark loop
contribution $a_\mu^{\textrm{LBL;quarkloop}} = (107 \pm 48)\times 10^{-11}$, is
strongly enhanced by vertex dressing effects in the quark photon vertex. Taken
seriously this leads to the estimate of $a_\mu=116\,591\,865.0(96.6)\times
10^{-11}$, giving a 1.9 $\sigma$ deviation between theory and experiment.

31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org