Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1995-10-24
Nucl.Phys. B466 (1996) 361-382
Physics
High Energy Physics
High Energy Physics - Theory
20 pages, LaTeX, 1 figure in a uuencoded-gzipcompressed ps file
Scientific paper
10.1016/0550-3213(96)00079-X
Form factor bootstrap approach is applied for diagonal scattering theories. We consider the ADE theories and determine the functional equations satisfied by the minimal two-particle form factors. We also determine the parameterization of the singularities in two particle form factors. For $A^{(1)}_{2}$ Affine Toda field theory which is the simplest non-self conjugate theory, form factors are derived up to four-body and identification of operator is done. Generalizing this identification to the $A^{(1)}_N$ Affine Toda cases, we fix the two particle form factors. We also determine the additional pole structure of form factors which comes from the double pole of the $S$-matrices of the $A^{(1)}_N$ theory. For $A_N$ theories, existence of the conserved ${\bf Z}_{N+1}$ charge leads to the division of the set of form factors into $N+1$ decoupled sectors.
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