Measurement of the High-Mass Drell-Yan Cross Section and Limits on   Quark-Electron Compositeness Scales
  We present a measurement of the Drell-Yan cross section at high dielectron invariant mass using 120/pb of data collected in pbar-p collisions at sqrt(s) = 1.8 TeV by the D0 collaboration during 1992-96. No deviation from standard model expectations is observed. We use the data to set limits on the energy scale of quark-electron compositeness with common constituents. The 95% confidence level lower limits on the compositeness scale vary between   3.3 TeV and 6.1 TeV depending on the assumed form of the effective contact interaction. 
B. Abbott, et al (D0 Collaboration)