Quantum Solitons in Affine Toda Field Theories

Abstract

The spectra of $A_r$ affine Toda field theories with imaginary coupling constant, are investigated. Soliton solutions are found, which, despite the non-unitary form of the Lagrangian, have real classical masses and are stable to small perturbations. The quantum corrections to the soliton masses are determined, to lowest order in $\hslash$. The solitons have the same spectrum as the fundamental Toda particles; a feature that is preserved in the quantum theory.

21 pages

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