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Phys. Rev. Lett. 101, 192002 (2008) [7 pages]

Search for the Flavor-Changing Neutral-Current Decay tZq in pp̅ Collisions at s=1.96  TeV

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T. Aaltonen et al. CDF Collaboration
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Received 15 May 2008; published 7 November 2008

We report a search for the flavor-changing neutral-current decay of the top quark tZq (q=u, c) in pp̅ collisions at s=1.96  TeV using a data sample corresponding to an integrated luminosity of 1.9  fb-1 collected by the CDF II detector. This decay is strongly suppressed in the standard model and an observation of a signal at the Fermilab Tevatron would be an indication of physics beyond the standard model. Using Z+≥4 jet final state candidate events, with and without an identified bottom quark jet, we obtain an upper limit of B(tZq)<3.7% at 95% C.L.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.192002
DOI:
10.1103/PhysRevLett.101.192002
PACS:
13.85.Qk, 12.60.Jv, 13.85.Rm, 14.80.Ly