Limits on the production of narrow t tmacr resonances in p pmacr collisions at s=1.96TeV
Abstract
We search for evidence of resonant top quark pair production in 955 pb-1 of p pmacr collisions at s=1.96TeV recorded with the CDF II detector at the Fermilab Tevatron. For fully reconstructed candidate t tmacr 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 tmacr pairs to the expected superposition of standard model t tmacr , non-t tmacr backgrounds, and a simple resonance model based on a sequential Z' boson. We establish upper limits for σ(p pmacr →Z')·Br(Z'→t tmacr ) 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 t tmacr is found to be less than 0.64 pb at 95% C.L. for MZ' above 700GeV/c2.
- Publication:
-
Physical Review D
- Pub Date:
- March 2008
- DOI:
- 10.1103/PhysRevD.77.051102
- arXiv:
- arXiv:0710.5335
- Bibcode:
- 2008PhRvD..77e1102A
- Keywords:
-
- 13.85.Rm;
- 14.65.Ha;
- 14.80.-j;
- Limits on production of particles;
- Top quarks;
- Other particles;
- High Energy Physics - Experiment
- E-Print:
- 7 Pages, 3 eps Figures