Search for New Particles Decaying to b bbar in p pbar Collisions at sqrt{s}=1.8 TeV

TL;DR

This paper reports a search for new particles decaying into bottom quark pairs using Fermilab collider data, setting limits on various hypothetical particles and excluding certain mass ranges for technirho and topgluon models.

Contribution

It provides the first model-independent upper limits on cross sections for narrow resonances decaying to b bbar in proton-antiproton collisions at 1.8 TeV.

Findings

Excluded the color-octet technirho in 350-440 GeV/c^2 range.

Excluded topgluons with different widths in specified mass ranges.

Set upper limits on cross sections for new particles decaying to b bbar.

Abstract

We have used 87 pb^-1 of data collected with the Collider Detector at Fermilab to search for new particles decaying to b bbar. We present model-independent upper limits on the cross section for narrow resonances which excludes the color-octet technirho in the mass interval 350 < M < 440 GeV/c^2. In addition, we exclude topgluons, predicted in models of topcolor-assisted technicolor, of width Gamma = 0.3 M in the mass range 280 < M < 670 GeV/c^2, of width Gamma = 0.5 M in the mass range 340 < M < 640 GeV/c^2, and of width Gamma = 0.7 M in the mass range 375 < M < 560 GeV/c^2.