Search for new particles in the two-jet decay channel with the DØ detector
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Abstract
We present the results of a search for the production of new particles decaying into two jets in $\overline{p}p$ collisions at $\sqrt{s}=1.8\mathrm{TeV},$ using the D\O{} 1992--1995 data set corresponding to ${109\mathrm{}\mathrm{pb}}^{\ensuremath{-}1}.$ We exclude at the 95% confidence level the production of excited quarks ${(q}^{*})$ with masses below 775 GeV/${c}^{2},$ the most restrictive limit to date. We also exclude standard-model-like ${W}^{\ensuremath{'}}$ ${(Z}^{\ensuremath{'}})$ bosons with masses between 300 and 800 GeV/${c}^{2}$ (400 and 640 GeV/${c}^{2}).$ A ${W}^{\ensuremath{'}}$ boson with mass $<786\mathrm{GeV}{/c}^{2}$ has been excluded by previous measurements, and our lower limit is therefore the most stringent to date.
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