Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Short-distance HLbL contributions to the muon g-2   The current $3.7\sigma$ discrepancy between the Standard Model prediction and
the experimental value of the muon anomalous magnetic moment could be a hint
for the existence of new physics. The hadronic light-by-light contribution is
one of the pieces requiring improved precision on the theory side, and an
important step is to derive short-distance constraints for this quantity
containing four electromagnetic currents. Here, we derive such short-distance
constraints for three large photon loop virtualities and the external fourth
photon in the static limit. The static photon is considered as a background
field and we construct a systematic operator product expansion in the presence
of this field. We show that the massless quark loop, i.e. the leading term, is
numerically dominant over non-perturbative contributions up to next-to-next-to
leading order, both those suppressed by quark masses and those that are not.

19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
18
The categories of this paper are: econ
16
The categories of this paper are: stat
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org