Search for resonant production of tt̅ pairs in 4.8 fb[superscript -1] of integrated luminosity of pp̅ collisions at √s=1.96 TeV
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Aaltonen-2011-Search for resonant production of t t pairs.pdf
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Author(s)
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Paus, Christoph M. E.
Makhoul, Khaldoun
Alternative Title
Search for resonant production of tt̅ pairs in 4.8 fb-1 of integrated luminosity of pp̅ collisions at √s=1.96 TeV
Date Issued
October 2011
Journal
Physical Review D
Publisher
American Physical Society (APS)
Citation
Aaltonen, T. et al. “Search for Resonant Production of Tt[over ¯] Pairs in 4.8 Fb^{-1} of Integrated Luminosity of Pp[over ¯] Collisions at Sqrt[s]=1.96 TeV.” Physical Review D 84.7 (2011): n. pag. Web. 24 Feb. 2012. © 2011 American Physical Society
Version
Final published version
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.84.072004
