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 phi4 theories in 1+1 dimensions
Finite-volume form factors in semi-classical approximation / Mussardo, Giuseppe; Riva, V.; Sotkov, G.. - In: NUCLEAR PHYSICS. B. - ISSN 0550-3213. - 670:3(2003), pp. 464-478. [10.1016/j.nuclphysb.2003.08.017]
Finite-volume form factors in semi-classical approximation
Mussardo, Giuseppe;
2003-01-01
Abstract
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 phi4 theories in 1+1 dimensionsI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
