Search for New Particles Decaying to top-antitop in proton-antiproton collisions at squareroot(s)=1.8 TeV

TL;DR

This study searches for new narrow-width vector particles decaying into top-antitop pairs using Fermilab collider data, setting limits on possible new particle masses and excluding certain models.

Contribution

It provides model-independent upper limits on cross sections and excludes specific leptophobic Z' bosons below certain masses in topcolor-assisted technicolor models.

Findings

Excluded Z' boson masses below 480 GeV for width 0.012 M_Z'

Excluded Z' boson masses below 780 GeV for width 0.04 M_Z'

Set upper limits on cross sections for narrow vector resonances

Abstract

We use 106 $\ipb$ of data collected with the Collider Detector at Fermilab to search for narrow-width, vector particles decaying to a top and an anti-top quark. Model independent upper limits on the cross section for narrow, vector resonances decaying to $\ttbar$ are presented. At the 95% confidence level, we exclude the existence of a leptophobic $\zpr$ boson in a model of topcolor-assisted technicolor with mass $M_{\zpr}$ $<$ 480 $\gev$ for natural width $\Gamma$ = 0.012 $M_{\zpr}$, and $M_{\zpr}$ $<$ 780 $\gev$ for $\Gamma$ = 0.04 $M_{\zpr}$.