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Generalisations of the Coleman-Thun mechanism and boundary reflection factors

Articolo
Data di Pubblicazione:
1999
Abstract:
We make a complete pole analysis of the reflection factors of the boundary scaling Lee-Yang model. In the process we uncover a number of previously unremarked mechanisms for the generation of simple poles in boundary reflection factors, which have implications for attempts to close the boundary bootstrap in more general models. We also explain how different boundary conditions can sometimes share the same fundamental reflection factor, by relating the phenomenon to potential ambiguities in the interpretation of certain poles. In the case discussed, this ambiguity can be lifted by specifying the sign of a bulk-boundary coupling. While the recipe we employ for the association of poles with general on-shell diagrams is empirically correct, we stress that a justification on the basis of more fundamental principles remains a challenge for future work.
Tipologia CRIS:
03A-Articolo su Rivista
Elenco autori:
DOREY P; R. TATEO; WATTS G
Autori di Ateneo:
TATEO Roberto
Link alla scheda completa:
https://iris.unito.it/handle/2318/10277
Pubblicato in:
PHYSICS LETTERS. SECTION B
Journal
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URL

http://lanl.arxiv.org/pdf/hep-th/9810098
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