New Electroweak Instanton and Possible Breakdown of Unitarity

Abstract

Potential implications of a new constrained instanton solution in the electroweak standard model are discussed. Notably, there may be a non-perturbative unitarity violating contribution to the total cross-section at high collision energies.

Comments: talk given at ICHEP94, Glasgow, July 1994, 2 pages in LATEX (ichep style file appended)