Search for resonant ttbar production in ppbar collisions at sqrt{s}=1.96 TeV

TL;DR

This paper searches for narrow-width particles decaying into top-antitop pairs in proton-antiproton collisions, setting limits on production cross sections and excluding certain Z' masses within a specific theoretical model.

Contribution

First search for narrow-width resonant ttbar production at Tevatron, providing upper limits and excluding Z' masses below 725 GeV/c^2 in a topcolor-assisted technicolor model.

Findings

Excluded Z' masses below 725 GeV/c^2 at 95% CL

Set upper limits on cross section times branching ratio

Analyzed 680 pb^{-1} of data from Fermilab Collider Detector

Abstract

We report on a search for narrow-width particles decaying to a top and antitop quark pair. The data set used in the analysis corresponds to an integrated luminosity of 680 pb^{-1} collected with the Collider Detector at Fermilab in Run II. We present 95% confidence level upper limits on the cross section times branching ratio. Assuming a specific topcolor-assisted technicolor production model, the leptophobic Z' with width \Gamma_{Z'}=0.012M_{Z'}, we exclude the mass range M_{Z'} < 725 GeV/c^2 at the 95% confidence level.