Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charged Particle Scattering from Electroweak and Semi-Local Strings   The scattering of a charged fermion from an electroweak or semi-local string
is investigated and a full solution obtained for both massive and massless
cases. For the former, with fractional string flux, there is a helicity
conserving and helicity-flip cross-section, of equal magnitude and of a
modified Aharonov-Bohm form: for integer flux the strong interaction
cross-section is suppressed by a logarithmic term. The results also apply for
GUT cosmic strings and chiral fermions.

12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org