In this talk we discuss an elementary derivation of the semi-classical spectrum of neutral particles in two field theories with kink excitations. We also show that, in the non-integrable cases, each vacuum state cannot generically support more than two stable particles, since all other neutral exitations are resonances, which will eventually decay.
CITATION STYLE
Mussardo, G. (2009). Kinks and Particles in Non-integrable Quantum Field Theories. In New Trends in Mathematical Physics (pp. 509–523). Springer Netherlands. https://doi.org/10.1007/978-90-481-2810-5_34
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