16.2. Scattering processes of the solitons Analyse the solution (16.3.15) with topological charge T = 2 of the Sine–Gordon model in the limits t→±∞. Determine the time delay ss. Based on the positive sign of this quantity and the negative sign of the analogous quantity s¯s for the scattering of the soliton and anti-soliton, argue on the nature of the interactions between soliton–soliton and soliton–anti-soliton.