We study and compare the discovery potential for heavy neutral gauge bosons (Z') at the various hadron colliders under discussion at Snowmass 2001 which range in sqrt{ s} from 14 TeV for the LHC to 200 TeV for a variant of the VLHC. Typical search limits for pp colliders are ~0.25-0.30 times sqrt{ s} assuming 100 fb^{ -1} to 1 ab^{ -1} of integrated luminosity with some variation due to differences of fermion couplings in the different models. Discovery limits at the Tevatron are ~1 TeV for 15 fb^{ -1}, approximately 30--50% higher than this rough guideline, due to the higher q\bar{ q} luminosities in the p\bar{ p} beams.
Categories: hep-ph