Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect of laser polarization in laser-assisted electron-helium inelastic
  collisions:a sturmian approach   The influence of linearly and circularly polarized laser fields on the
dynamics of fast electron-impact excitation in atomic helium is discussed. A
detailed analysis is made in the excitation of 2^1S, 3^1S and 3^1D dressed
states of helium target.

24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph