Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Matrix Model for the Transition Expansion of Dispersive Corrections to
  Nucleon-Nucleus Total Cross Sections   A finite-dimensional matrix model for the nucleon-nucleon cross section
operator is used to calculate the dispersive correction to nucleon-nucleus
total cross sections, and the leading terms in its expansion in the number of
inelastic transitions in the high-energy limit where the longitudnal momentum
transfers can be ignored.

4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
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The categories of this paper are: chao-dyn
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The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci