Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nucleon contribution to the neutrino electromagnetic vertex in matter   We calculate the nucleon contribution to the electromagnetic vertex of a
neutrino in a background of particles, including the effect of the anomalous
magnetic moment of the nucleons. Explicit formulas for the form factors are
given in various physical limits of practical interest. Several applications of
the results are mentioned, including the effect of an external magnetic field
on the dispersion relation of a neutrino in matter.

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The categories of this paper are: adap-org
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The categories of this paper are: chem-ph
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The categories of this paper are: econ
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The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
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The categories of this paper are: alg-geom
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The categories of this paper are: ao-sci
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The categories of this paper are: mtrl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: funct-an
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The categories of this paper are: math-ph
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat