Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bound State Boundary S-matrix of the sine-Gordon Model   We study the boundary S-matrix for the reflection of bound states of the
two-dimensional sine-Gordon integrable field theory in the presence of a
boundary.

0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph