Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1997-01-14
Nucl.Phys. B497 (1997) 589-610
Physics
High Energy Physics
High Energy Physics - Theory
22 pages, LaTeX file, 1 figure in file zeta.ps
Scientific paper
10.1016/S0550-3213(97)00303-9
We compute the form factors of exponential operators $e^{kg\varphi(x)}$ in the two-dimensional integrable Bullough-Dodd model ($a_2^{(2)}$ Affine Toda Field Theory). These form factors are selected among the solutions of general nonderivative scalar operators by their asymptotic cluster property. Through analitical continuation to complex values of the coupling constant these solutions permit to compute the form factors of scaling relevant primary fields in the lightest-breather sector of integrable $\phi_{1,2}$ and $\phi_{1,5}$ deformations of conformal minimal models. We also obtain the exact wave-function renormalization constant Z(g) of the model and the properly normalized form factors of the operators $\varphi(x)$ and $:\varphi^2(x):$.
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