• Rapid Communication

Limits on the production of narrow tt¯ resonances in pp¯ collisions at s=1.96TeV

T. Aaltonen et al. (CDF Collaboration)
Phys. Rev. D 77, 051102(R) – Published 12 March 2008

Abstract

We search for evidence of resonant top quark pair production in 955 pb1 of pp¯ collisions at s=1.96TeV recorded with the CDF II detector at the Fermilab Tevatron. For fully reconstructed candidate tt¯ 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¯ pairs to the expected superposition of standard model tt¯, non-tt¯ backgrounds, and a simple resonance model based on a sequential Z boson. We establish upper limits for σ(pp¯Z)·Br(Ztt¯) in the Z mass interval from 450GeV/c2 to 900GeV/c2. A topcolor leptophobic Z is ruled out below 720GeV/c2, and the cross section of any narrow Z-like state decaying to tt¯ is found to be less than 0.64 pb at 95% C.L. for MZ above 700GeV/c2.

  • Figure
  • Figure
  • Figure
  • Received 30 October 2007

DOI:https://doi.org/10.1103/PhysRevD.77.051102

©2008 American Physical Society

Authors & Affiliations

Click to Expand

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 77, Iss. 5 — 1 March 2008

Reuse & Permissions
Access Options

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×