# Limits on the Production of Narrow $t\bar{t}$ Resonances in $p\bar{p}$ Collisions at $\sqrt{s}$=1.96 TeV

Abstract : We search for evidence of resonant top quark pair production in 955 pb-1 of p-pbar collisions at sqrt(s)=1.96 TeV recorded with the CDF II detector at the Fermilab Tevatron. For fully reconstructed candidate t-tbar events triggered on leptons with large transverse momentum and containing at least one identified b-quark jet, we compare the invariant mass spectrum of t-tbar pairs to the expected superposition of standard model t-tbar, non-t-tbar backgrounds, and a simple resonance model based on a sequential Z' boson. We establish upper limits for sigma(p-pbar to Z') times Br(Z' to t-tbar) 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 t-tbar is found to be less than 0.64 pb at 95% C.L. for M(Z') above 700 GeV/c2.
Document type :
Journal articles
Complete list of metadatas

http://hal.in2p3.fr/in2p3-00184510
Contributor : Dominique Girod <>
Submitted on : Wednesday, October 31, 2007 - 11:05:09 AM
Last modification on : Wednesday, October 14, 2020 - 3:12:23 AM

### Citation

T. Aaltonen, J. Adelman, T. Akimoto, M.G. Albrow, B. Alvarez Gonz'Alez, et al.. Limits on the Production of Narrow $t\bar{t}$ Resonances in $p\bar{p}$ Collisions at $\sqrt{s}$=1.96 TeV. Physical Review D, American Physical Society, 2008, 77, pp.051102. ⟨10.1103/PhysRevD.77.051102⟩. ⟨in2p3-00184510⟩

Record views