In this work, we study kink collisions in a scalar field model with scalar-kinetic coupling. This model supports kink/antikink solutions with inner structure in the energy density. The collision of two such kinks is simulated by using the Fourier spectral method. We numerically calculate how the critical velocity and the widths of the first three two bounce windows vary with the model parameters. After that, we report some interesting collision results including two-bion escape final states, kink-bion-antikink intermediate states and kink or antikink intertwined final states. These results show that kinks with inner structure in the energy density have similar properties as those of the double kinks.
Journal of High Energy Physics
- Pub Date:
- February 2020
- Field Theories in Lower Dimensions;
- Solitons Monopoles and Instantons;
- High Energy Physics - Theory
- 20 pages, 11 figures, prepared for publication in JHEP