# Search for ttbar resonances in the lepton plus jets final state in ppbar collisions at sqrt{s}=1.96TeV

Abstract : We present a search for a narrow-width heavy resonance decaying into top quark pairs X->ttbar in ppbar collisions at sqrt{s}=1.96TeV using approximately 0.9fb^-1 of data collected with the D0 detector at the Fermilab Tevatron Collider. This analysis considers ttbar candidate events in the lepton plus jets channel with at least one identified b jet and uses the ttbar invariant mass distribution to search for evidence of resonant production. We find no evidence for a narrow resonance X decaying to ttbar. Therefore, we set upper limits on sigma*B(X->ttbar) for different hypothesized resonance masses using a Bayesian approach. For a Topcolor-assisted technicolor model, the existence of a leptophobic Z' boson with mass M_Z'<700GeV and width Gamma_Z'=0.012 M_Z' can be excluded at the 95% C.L.
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Journal articles
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http://hal.in2p3.fr/in2p3-00275488
Contributor : Danielle Cristofol <>
Submitted on : Thursday, April 24, 2008 - 10:28:32 AM
Last modification on : Wednesday, September 16, 2020 - 4:21:00 PM

### Citation

V.M. Abazov, B. Abbott, M. Abolins, B.S. Acharya, M. Adams, et al.. Search for ttbar resonances in the lepton plus jets final state in ppbar collisions at sqrt{s}=1.96TeV. Physics Letters B, Elsevier, 2008, 668, pp.98-104. ⟨10.1016/j.physletb.2008.08.027⟩. ⟨in2p3-00275488⟩

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