Instanton-Like Transitions at High Energies in (1+1) Dimensional Scalar Models

Abstract

Instanton-like transitions (``shadow processes'') are considered in (1+1) dimensional models with one scalar field whose potential is a quadratic well with a cliff. The corresponding classical boundary value problem is solved, and the semiclassical transition probabilities are found in a rather wide range of energies and the numbers of initial particles.

Comments: LaTeX, 42pp. including 6 LaTeX figures, 3 figures available in PostScript