Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evolution equations of the truncated moments of the parton densities. A
  possible application   A possible application of the evolution equation for the truncated Mellin
moments to determination of the parton distributions in the nucleon is
presented. We find that the reconstruction of the initial parton densities at
scale $Q_0^2$ from their truncated moments at a given scale $Q^2$ is exact and
unique for small number of free parameters ($\leq 3$), even for the limited
$x$-region of experimental data. For larger number of adjustable parameters the
obtained fits are not unique and one needs an additional knowledge of the
small-$x$ behaviour of the parton densities to make the reconstruction
procedure reliable. We apply successfully our method to HERMES and COMPASS
spin-dependent valence quark data.

11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph