| Production of hadronic jets is the dominant contribution to high transverse momentum (pT) processes in proton-antiproton pp¯ collisions. The high (pT) jets produced by these processes are described by perturbative Quantum Chromodynamics (QCD). Although, the Standard Model does an excellent job of explaining the current state of particle physics, there are many extensions to this model that predict the existence of new massive objects (excited quarks, W′ and Z′) which couple to quarks and gluons and will form resonant structures in the two jet (dijet) mass spectrum.; The data used in this search is the well understood dijet mass spectrum taken during the 1992–93 and 1994–95 running periods at DØ with an integrated luminosity of 109 pb−1 and a center of mass energy of 1.8 TeV. The data was corrected back to the particle level to be compared with Monte Carlo simulated signal (excited quark, W′ and Z′) models and background (two jet QCD events) model. The signal and background models are corrected for detector resolution effects. A probability distribution for the predicted signal cross section; σx, is obtained using Bayesian statistics and a 95% confidence limit is calculated.; We exclude at the 95% confidence level the production of excited quarks (q*) with masses below 770 GeV/c2, an additional standard model W boson (W′) with masses between 300 and 830 GeV/c2 and an additional standard model Z boson (Z′) with masses between 420 and 620 GeV/c2. |
