Exploring Confinement with Spin

Abstract

A confining gauge theory violates the completeness of asymptotic states held as foundation points of the $S$-matrix. Spin-dependent experiments can yield results that appear to violate quantum mechanics. The point is illustrated by violation of the Soffer bound in $QCD$. Experimental confirmation that the bound is violated would be a discovery of immense importance, sweeping away fundamental assumptions of strong interaction physics held for the past 50 years.

Comments: to appear in Transversity '08, Proceedings of the Second International Workshop on Transverse Polarization Phenomena in Hard Scattering (ferrara, Italy, May 2008)