Search for anomalous four-jet events in e+e− annihilation at =130−172

Abstract

A study of hadronic events with high jet-multiplicity is performed using the data sample collected by the L3 experiment at LEP at & = 130-172 GeV. The observed event rates agree with the Standard Model predictions and upper limits are set on the production cross section of pairs of heavy particles that decay hadronically. 0 1997 Elsevier Science B.V.