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Phys. Rev. Lett. 100, 161803 (2008) [7 pages]

Search for Heavy Toplike Quarks Using Lepton Plus Jets Events in 1.96 TeV pp̅ Collisions

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T. Aaltonen et al. CDF Collaboration
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Received 24 January 2008; published 22 April 2008

We present the results of a search for pair production of a new heavy toplike quark t decaying to a W boson and another quark using the Collider Detector at Fermilab II detector in run II of the Tevatron pp̅ collider. Using a data sample corresponding to 760  pb-1 of integrated luminosity, we fit the observed spectrum of total transverse energy and reconstructed t quark mass to a combination of standard model processes and t pair production. We see no evidence for tt̅ production, and we infer a lower limit of 256  GeV/c2 on the mass of the t at 95% C.L. assuming standard strong couplings for the t.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.161803
DOI:
10.1103/PhysRevLett.100.161803
PACS:
13.85.Rm, 12.60.−i, 14.65.Ha, 14.80.−j