Search for resonant production of tt̅ decaying to jets in pp̅ collisions at √s=1.96 TeV
This paper reports a search for nonstandard model topquark resonances, Z′, decaying to tt̅ →W[superscript +]bW-b̅ , where both W decay to quarks. We examine the top-antitop quark invariant mass spectrum for the presence of narrow resonant states. The search uses a data sample of pp̅ collisions at a...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2012
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| Online Access: | http://hdl.handle.net/1721.1/71164 https://orcid.org/0000-0002-6047-4211 |
| Summary: | This paper reports a search for nonstandard model topquark resonances, Z′, decaying to tt̅ →W[superscript +]bW-b̅ , where both W decay to quarks. We examine the top-antitop quark invariant mass spectrum for the presence of narrow resonant states. The search uses a data sample of pp̅ collisions at a center of mass energy of 1.96 TeV collected by the CDF II detector at the Fermilab Tevatron, with an integrated luminosity of 2.8 fb-[superscript 1]. No evidence for top-antitop quark resonant production is found. We place upper limits on the production cross section times branching ratio for a specific topcolor assisted technicolor model in which the Z′ has a width of Γ[subscript Z]′=0.012M[subscriptZ]′. Within this model, we exclude a Z′ boson with masses below 805 GeV/c[superscript 2] at the 95% confidence level. |
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