Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Possible saturation effects at HERA and LHC in the $k_T$-factorization
  approach   We consider possible saturation effects in the structure function $F_L$ at
fixed W in HERA energy range and in $b\bar b-$production at LHC energies in the
framework of $k_T-$facrorization approach.

23
The categories of this paper are: solv-int
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex