Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the parafermionic scattering of an integrable Heisenberg model with
  impurity   We have studied the massive parafermionic sector of an integrable spin-$s$
chain with an impurity of spin-$s^{'}$ in presence of a magnetic field. The
effect of the impurity is encoded in a computable parafermionic impurity
scattering amplitude and its contribution to the finite size properties of the
free energy is discussed. As an example we compute the non-integer degeneracy
of the ground state. For the simplest model of $s=1$ and $s^{'}=1/2$, its
interpretation in terms of conformally invariant boundary conditions is
presented.

18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex