Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: DSE Perspective on QCD Modeling, Distribution Amplitudes, and Form
  Factors   We describe results for the pion distribution amplitude (PDA) at the
non-perturbative scale $\mu=~$2GeV by projecting the Poincar\'e-covariant
Bethe-Salpeter wave-function onto the light-front and use it to investigate the
ultraviolet behavior of the electromagnetic form factor, $F_\pi(Q^2)$, on the
entire domain of spacelike $Q^2$. The significant dilation of this PDA compared
to the known asymptotic PDA is a signature of dynamical chiral symmetry
breaking (DCSB) on the light front. We investigate the transition region of
$Q^2$ where non-perturbative behavior of constituent-like quarks gives way to
the partonic-like behavior of quantum chromodynamics (QCD). The
non-perturbative approach is based on the Dyson-Schwinger equation (DSE)
framework for continuum investigations in QCD. The leading-order, leading-twist
perturbative QCD result for $Q^2 F_\pi(Q^2)$ underestimates the new DSE
computation by just 15\% on $Q^2\gtrsim 8\,$GeV$^2$, in stark contrast with the
result obtained using the asymptotic PDA.

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The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph