Otro
Finite-volume form factors in semi-classical approximation
Registro en:
Nuclear Physics B. Amsterdam: Elsevier B.V., v. 670, n. 3, p. 464-478, 2003.
0550-3213
10.1016/j.nuclphysb.2003.08.017
WOS:000186210300006
Autor
Mussardo, G.
Riva, V
Sotkov, G.
Resumen
A semi-classical approach is used to obtain Lorentz covariant expressions for the form factors between the kink states of a quantum field theory with degenerate vacua. Implemented on a cylinder geometry it provides an estimate of the spectral representation of correlation functions in a finite volume. Illustrative examples of the applicability of the method are provided by the sine-Gordon and the broken phi(4) theories in 1 + 1 dimensions. (C) 2003 Elsevier B.V. All rights reserved.