Revisiting Soliton Contributions to Perturbative Amplitudes

Understand

It is often said that soliton contributions to perturbative processes in QFT are exponentially suppressed by a form factor.

• We provide a new derivation of this form factor for a class of scalar theories with generic soliton moduli.
• The derivation treats the soliton momenta relativistically and is valid at leading order in momentum transfer.
• The computation reduces to a matrix element in the quantum mechanics on the soliton moduli space.