GLOBAL STUDY OF ELECTRON-QUARK CONTACT INTERACTIONS

We perform a global fit of data relevant to eeqq contact interactions, including,deep inelastic scattering at high Q(2) from ZEUS and H1, at omic physics parity violation in cesium from JILA, polarized e(-) on n uclei scattering experiments at SLAC, Mainz and Bates, Drell-Yan produ ction at the Fermilab Tevatron, the total hadronic cross section sigma (had) at CERN LEP, and neutrino-nucleon scattering from CCFR. With onl y the new DESY HERA data, the presence of contact interactions improve s the fit compared to the standard model. When other data sets are inc luded, the size of the contact contributions is reduced and the overal l fit represents no real improvement over the standard model. [S0556-2 821(98)00201-X].