Global analysis of eeqq contact interactions and future prospects for high energy physics
Institute of Experimental Physics, Warsaw University,
Hoza 69, 00-681 Warszawa, Poland
Received: 10 May 1999 / Revised version: 24 June 1999 / Published online: 22 October 1999
Data from HERA, LEP and the Tevatron as well as from low energy experiments are used to constrain the scale of possible electron-quark contact interactions. Different models are considered, including the most general one, in which all new couplings can vary independently. Limits on couplings and mass scales are extracted and upper limits on possible effects to be observed in future HERA, LEP and Tevatron runnings are estimated. The total hadronic cross section at LEP and the e-p scattering cross section at HERA are strongly constrained by the existing data, whereas large cross section deviations are still possible for Drell-Yan lepton pair production at the Tevatron.