Instanton corrections to the MSTB Kink mass
A bstract The Montonen-Sarker-Trullinger-Bishop (MSTB) model enjoys two classically degenerate kink solutions in the same topological sector. We construct the instanton that interpolates between them and argue that the two lowest lying Hamiltonian eigenstates in the kink sector of the corresponding quantum theory correspond to symmetric and antisymmetric combinations of coherent states localized at these two solutions. We use the instanton gas approximation to provide a simple, analytic formula for the leading contribution to the mass splitting between these two states.
Authors
- Alberto García Martín-Caro (ORCID: https://orcid.org/0000-0003-1506-1140)
- A. Wereszczyński (ORCID: https://orcid.org/0000-0002-0353-4812)
- Jarah Evslin (ORCID: https://orcid.org/0000-0003-0875-0503)
Institutions
- Jagiellonian University (PL)
- University of the Basque Country (ES)
- Institute of Modern Physics (CN)
- International Institute for Sustainability (BR)
- University of Chinese Academy of Sciences (CN)
Publication Details
- Journal
- Journal of High Energy Physics
- Published
- 2025-04-23
- DOI
- https://doi.org/10.1007/jhep04(2025)173
- Citations
- 1
- Primary Topic
- Particle physics theoretical and experimental studies
- Type
- article
- Field-Weighted Citation Impact
- 1.87
Funders
- European Commission
- National Natural Science Foundation of China
- Eusko Jaurlaritza
- European Regional Development Fund