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Elsevier, Nuclear Physics B, 3(741), p. 353-367, 2006

DOI: 10.1016/j.nuclphysb.2006.02.004

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Double sine-Gordon model revisited

Journal article published in 2006 by G. Takács ORCID, F. Wágner
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

We reconsider the mass spectrum of double sine-Gordon theory where recent semiclassical results called into question the previously accepted picture. We use the truncated conformal space approach (TCSA) to investigate the claims. We demonstrate that the numerics supports the original results, and strongly disagrees with those obtained from semiclassical soliton form factor techniques. Besides the numerical analysis, we also discuss the underlying theoretical arguments. (c) 2006 Elsevier B.V. All rights reserved.