Search for new particles decaying into dijets in proton-antiproton collisions ats=1.96TeV

We present a search for new particles which produce narrow two-jet (dijet) resonances using proton-antiproton collision data corresponding to an integrated luminosity of $1.13{\mathrm{fb}}^{-1}$ collected with the CDF II detector. The measured dijet mass spectrum is found to be consistent with next-to-leading-order perturbative QCD predictions, and no significant evidence of new particles is found. We set upper limits at the 95% confidence level on cross sections times the branching fraction for the production of new particles decaying into dijets with both jets having a rapidity magnitude $|y|<1$. These limits are used to determine the mass exclusions for the excited quark, axigluon, flavor-universal coloron, $E_6$ diquark, color-octet techni-$\rho$, $W^{\prime }$, and $Z^{\prime }$.