Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High-energy elementary amplitudes from quenched and full QCD   Making use of the Stochastic Vacuum Model and the gluon gauge-invariant
two-point correlation function, determined by numerical simulation on the
lattice in both quenched approximation and full QCD, we calculate the
elementary (quark-quark) scattering amplitudes in the momentum transfer space
and at asymptotic energies. Our main conclusions are the following: (1) the
amplitudes decrease monotonically as the momentum transfer increases; (2) the
decreasing is faster when going from quenched approximation to full QCD (with
decreasing quark masses) and this effect is associated with the increase of the
correlation lengths; (3) dynamical fermions generate two components in the
amplitude at small momentum transfer and the transition between them occurs at
momentum transfer near 1 GeV$^2$. We also obtain analytical parametrizations
for the elementary amplitudes, that are suitable for phenomenological uses, and
discuss the effects of extrapolations from the physical regions investigated in
the lattice.

37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph