Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Systematic estimation of theoretical uncertainties in the calculation of
  the pion-photon transition form factor using light-cone sum rules   We consider the calculation of the pion-photon transition form factor
$F^{\gamma^*\gamma\pi^0}(Q^2)$ within light-cone sum rules focusing attention
to the low-mid region of momenta. The central aim is to estimate the
theoretical uncertainties which originate from a wide variety of sources
related to (i) the relevance of next-to-next-to-leading order radiative
corrections (ii) the influence of the twist-four and the twist-six term (iii)
the sensitivity of the results on auxiliary parameters, like the Borel scale
$M^2$, (iv) the role of the phenomenological description of resonances, and (v)
the significance of a small but finite virtuality of the quasireal photon.
Predictions for $F^{\gamma^*\gamma\pi^0}(Q^2)$ are presented which include all
these uncertainties and found to comply within the margin of experimental error
with the existing data in the $Q^2$ range between 1 and 5 GeV$^2$, thus
justifying the reliability of the applied calculational scheme. This provides a
solid basis for confronting theoretical predictions with forthcoming data
bearing small statistical errors.

28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
9
The categories of this paper are: nlin