Search for Excited Quarks in $e^+ e^-$ Interactions With the Cello Detector

Abstract The production of excited quarks has been looked for in e + e − interactions at PETRA at center of mass energies up to 46.8 GeV using the CELLO detector. The different final state topologies considered are four-jets, two-jets and two-photons, three-jets, two-jets and one-photon. No deviation from standard QCD predictions is observed, thus yielding limits on the coupling constants and the masses of these possible quark states.