Title
Limits on the production of narrow <tex>$t\overline{t}$</tex> resonances in <tex>$p\overline{p}$</tex> collisions at <tex>$\sqrt{s}$</tex>=1.96 TeV Limits on the production of narrow <tex>$t\overline{t}$</tex> resonances in <tex>$p\overline{p}$</tex> collisions at <tex>$\sqrt{s}$</tex>=1.96 TeV
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Lancaster, Pa ,
Subject
Physics
Source (journal)
Physical review : D : particles and fields. - Lancaster, Pa, 1970 - 2003
Volume/pages
77(2008) :5 , p. 051102,1-051102,7
ISSN
0556-2821
ISI
000254544200002
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
We search for evidence of resonant top quark pair production in 955 pb-1 of pp&#773; collisions at √s=1.96   TeV recorded with the CDF II detector at the Fermilab Tevatron. For fully reconstructed candidate tt&#773; events triggered on leptons with large transverse momentum and containing at least one identified b-quark jet, we compare the invariant mass spectrum of tt&#773; pairs to the expected superposition of standard model tt&#773; , non-tt&#773; backgrounds, and a simple resonance model based on a sequential Z′ boson. We establish upper limits for σ(pp&#773; →Z′)·Br(Z′→tt&#773; ) in the Z′ mass interval from 450  GeV/c2 to 900  GeV/c2. A topcolor leptophobic Z′ is ruled out below 720  GeV/c2, and the cross section of any narrow Z′-like state decaying to tt&#773; is found to be less than 0.64 pb at 95% C.L. for MZ′ above 700  GeV/c2.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/765298/d0278235.pdf
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