Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nucleon electric polarizability in soliton models and the role of the
  seagull terms   The full Hamiltonian of the soliton models contains no electric seagull
terms. Here it is shown that if one restricts the fields to the collective
subspace then electric seagull terms are induced in the effective Hamiltonian.
These effective seagull contributions are consistent with gauge invariance.
They also reproduce the leading nonanalytic behavior of a large $N_c$ chiral
perturbation theory calculation of the electric polarizability.

8
The categories of this paper are: hep-ex
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The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol