Search for New Particles in the Two-Jet Decay Channel with the D0 Detector

TL;DR

This paper reports a search for new particles decaying into two jets using DZero data, setting new exclusion limits on excited quarks and W'/Z' bosons at TeV-scale masses.

Contribution

It provides the most restrictive limits to date on excited quarks and W'/Z' bosons in the two-jet decay channel at TeV energies.

Findings

Excluded excited quarks with masses below 775 GeV/c^2.

Excluded W' and Z' bosons with masses between 300 and 800 GeV/c^2.

Established the most stringent limits to date for these particles.

Abstract

We present the results of a search for the production of new particles decaying into two jets in pbarp collisions at sqrt{s} = 1.8 TeV, using the DZero 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/c^2, the most restictive limit to date. We also exclude standard-model-like W' (Z') bosons with masses between 300 and 800 GeV/c^2 (400 and 640 GeV/c^2). A W' boson with mass $<$ 300 GeV/c^2 has been excluded by previous measurements, and our lower limit is therefore the most stringent to date.