Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Form-Factor Bootstrap and the Operator Content of Perturbed Minimal
  Models   The form-factor bootstrap approach is applied to the perturbed minimal models
$M_{2,2n+3}$ in the direction of the primary field $\phi_{1,3}$. These theories
are integrable and contain $n$ massive scalar particles, whose $S$--matrix is
purely elastic. The form-factor equations do not refer to a specific operator.
We use this fact to classify the operator content of these models. We show that
the perturbed models contain the same number of primary fields as the conformal
ones. Explicit solutions are constructed and conjectured to correspond to the
off-critical primary fields $\phi_{1,k}$.

23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys