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Article
Report number	hep-th/9512030 ; CERN-TH-95-321 ; ENSLAPP-A-565-95 ; SNUTP-95-119 ; CERN-TH-95-321 ; ENSLAPP-A-565 ; SNUTP-95-119
Title	Lagrangian formulation of symmetric space sine-Gordon models
Author(s)	Bakas, Ioannis (CERN ; Annecy, LAPP) ; Park, Q-Han (Kyung Hee U.) ; Shin, Hyun-Jonag (Kyung Hee U.)
Affiliation	(CERN) ; (ENSLAPP Annecy)
Publication	1996
Imprint	6 Dec 1995
Number of pages	12
Note	12 pages Report-no: CERN-TH/95-321, ENSLAPP-A-565/95, SNUTP 95-119
In:	Phys. Lett. B 372 (1996) 45-52
DOI	10.1016/0370-2693(96)00026-3
Subject category	Particle Physics - Theory
Abstract	The symmetric space sine-Gordon models arise by conformal reduction of ordinary 2-dim $\sigma$-models, and they are integrable exhibiting a black-hole type metric in target space. We provide a Lagrangian formulation of these systems by considering a triplet of Lie groups $F \supset G \supset H$. We show that for every symmetric space $F/G$, the generalized sine-Gordon models can be derived from the $G/H$ WZW action, plus a potential term that is algebraically specified. Thus, the symmetric space sine-Gordon models describe certain integrable perturbations of coset conformal field theories at the classical level. We also briefly discuss their vacuum structure, Backlund transformations, and soliton solutions.
Copyright/License	Copyright @ unknown. Published by Elsevier B.V.

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