Top pair production with an extra gluon at the Tevatron

Abstract

We calculate top pair production and decay at the Tevatron $p\bar{p}$ collider, with the emission of an extra gluon, and study the corresponding $W+5$\,jet top signals including full spin correlations in the $W\to \ell \nu$ leptonic and $W\to jj$ hadronic decays. We study the feasibility of reconstructing $W+5$\,jet top events with a single $b$-tag, including realistic energy resolution. Our suggested basic procedure based on kinematic fitting achieves about 74\% reconstruction efficiency, with 74\% of the reconstructed events correctly classified (purity); this improves to 82\% efficiency with 77\% purity in double-$b$-tagged events. We suggest possible refinements, based on virtuality criteria, that give higher purity at the cost of lower reconstruction efficiency.

12 pages, plain Latex. 5 figures (7 postscript files) included. Compressed postscript file of text and figures will be available from http://phenom.physics.wisc.edu/pub/preprints/1995/madph-95-909.ps.Z or from ftp://phenom.physics.wisc.edu/pub/preprints/1995/madph-95-909.ps.Z

References in corpus (8)

• Observation of Top Quark Production in Pbar-P Collisions
• Observation of the Top Quark
• Automatic Generation of Tree Level Helicity Amplitudes
• Evidence for Top Quark Production in $\bar{p}p$ Collisions at $\sqrt{s}=1.8$ TeV
• Kinematic Evidence for Top Quark Pair Production in $W+$ Multijet Events in $p\bar{p}$ Collisions at $\sqrt{s}$~=~1.8 TeV
• Gluon Radiation in t\bar{t} Production at the Tevatron p\bar{p} Collider
• Calculation of Z Plus Four Jet Production at the Tevatron
• Further ways to distinguish single-lepton top quark signals from background at the Tevatron

Cited by in corpus (2)

• Jet Algorithms and Top Quark Mass Measurement
• Soft Gluon Radiation in Top Events: Effect of Hadronic $W$ Decays