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Resonance structures in kink-antikink collisions in a deformed sine-Gordon model

Dorey, Patrick and Gorina, Anastasia and Perapechka, Ilya and Romańczukiewicz, Tomasz and Shnir, Yakov (2021) 'Resonance structures in kink-antikink collisions in a deformed sine-Gordon model.', Journal of high energy physics., 2021 (9). p. 145.


We study kink-antikink collisions in a model which interpolates smoothly between the completely integrable sine-Gordon theory, the ϕ4 model, and a ϕ6-like model with three degenerate vacua. We find a rich variety of behaviours, including integrability breaking, resonance windows with increasingly irregular patterns, and new types of windows near the ϕ6-like regime. False vacua, extra kink modes and kink fragmentation play important roles in the explanations of these phenomena. Our numerical studies are backed up by detailed analytical considerations.

Item Type:Article
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Publisher statement:Open Access . This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
Date accepted:30 August 2021
Date deposited:19 October 2021
Date of first online publication:22 September 2021
Date first made open access:19 October 2021

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