Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2008-04-23
Phys.Lett.B668:98-104,2008
Physics
High Energy Physics
High Energy Physics - Experiment
8 pages, 3 figures, submitted to PLB
Scientific paper
10.1016/j.physletb.2008.08.027
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.
"D0 Collaboration
Abazov V.
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