Search for new particles in the two-jet decay channel with the DØ detector

Abstract

We present the results of a search for the production of new particles decaying into two jets in p̅p collisions at √s=1.8TeV, using the DØ 1992-1995 data set corresponding to 109 pb^-1. We exclude at the 95% confidence level the production of excited quarks (q^∗) with masses below 775 GeV/c², the most restrictive limit to date. We also exclude standard-model-like W'(Z') bosons with masses between 300 and 800 GeV/c² (400 and 640 GeV/c²). A W' boson with mass <786GeV/c² has been excluded by previous measurements, and our lower limit is therefore the most stringent to date.