Search for resonant production of tt̅ pairs in 4.8 fb[superscript -1] of integrated luminosity of pp̅ collisions at √s=1.96 TeV
We search for resonant production of tt̅ pairs in 4.8 fb[superscript -1] integrated luminosity of pp̅ collision data at √s=1.96 TeV in the lepton+jets decay channel, where one top quark decays leptonically and the other hadronically. A matrix-element reconstruction technique is used; for each even...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society (APS)
2012
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| Online Access: | http://hdl.handle.net/1721.1/69199 https://orcid.org/0000-0002-6047-4211 |
| Summary: | We search for resonant production of tt̅ pairs in 4.8 fb[superscript -1] integrated luminosity of pp̅ collision data at √s=1.96 TeV in the lepton+jets decay channel, where one top quark decays leptonically and the other hadronically. A matrix-element reconstruction technique is used; for each event a probability density function of the tt̅ candidate invariant mass is sampled. These probability density functions are used to construct a likelihood function, whereby the cross section for resonant tt̅ production is estimated, given a hypothetical resonance mass and width. The data indicate no evidence of resonant production of tt̅ pairs. A benchmark model of leptophobic Z′→tt̅ is excluded with m[subscript Z]′<900 GeV/c[superscript 2] at 95% confidence level. |
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