Search for Narrow-Width ttbar Resonances in ppbar Collisions at center of mass energy = 1.8 TeV

TL;DR

This paper reports a search for narrow-width resonances decaying into top-antitop pairs in proton-antiproton collisions at 1.8 TeV, setting upper limits and excluding certain new particles.

Contribution

First search for narrow-width ttbar resonances at 1.8 TeV using lepton plus jets data, establishing new exclusion limits on specific topcolor particles.

Findings

No significant deviation from Standard Model observed

Set 95% C.L. upper limits on resonance production cross section

Excluded leptophobic topcolor particle with M_X < 560 GeV/c^2

Abstract

We present a preliminary result on a search for narrow-width resonances that decay into ttbar pairs using 130 pb^{-1} of lepton plus jets data in ppbar collisions at center of mass energy = 1.8 TeV. No significant deviation from Standard Model prediction is observed. 95% C.L. upper limits on the production cross section of the narrow-width resonance times its branching fraction to ttbar are presented for different resonance masses, M_X. We also exclude the existence of a leptophobic topcolor particle, X, with M_X < 560 GeV/c^2 for a width \Gamma_X = 0.012 M_X.