Contact Interactions and high $Q^2$ Events at HERA

Abstract

Effective $eeqq$ contact interactions can enhance event rates in $e^{+}p$ scattering at HERA at high $Q^2$. Present constraints from atomic parity violation measurements and from Drell Yan events at the Tevatron are discussed.

Comments: 3 pages, Latex, Talk given at 5th International Workshop on Deep Inelastic Scattering and QCD, Chicago, Illinois, USA, 14-18 April 1997