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Title: A search for resonant production of tt pairs in 4.8 fb-1 of integrated luminosity of pp collisions at √s=1.96 TeV

We search for resonant production of tt pairs in 4.8 fb-1 integrated luminosity of pp 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 (pdf) of the tt candidate invariant mass is sampled. These pdfs are used to construct a likelihood function, whereby the cross section for resonant tt production is estimated, given a hypothetical resonance mass and width. The data indicate no evidence of resonant production of tt pairs. A benchmark model of leptophobic Z' → tt is excluded with mZ' < 900 GeV at 95% confidence level.
Authors:
 [1]
  1. et al.
Publication Date:
OSTI Identifier:
1021498
Report Number(s):
FERMILAB-PUB--11-350-E
Journal ID: ISSN 1550-7998; arXiv eprint number arXiv:1107.5063; TRN: US1104009
Grant/Contract Number:
AC02-07CH11359
Type:
Accepted Manuscript
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Name: Physical Review. D, Particles, Fields, Gravitation and Cosmology; Journal ID: ISSN 1550-7998
Publisher:
American Physical Society (APS)
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Contributing Orgs:
CDF Collaboration
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BENCHMARKS; CROSS SECTIONS; DECAY; LUMINOSITY; MATRIX ELEMENTS; PROBABILITY DENSITY FUNCTIONS; PRODUCTION; RESONANCE; T QUARKS Experiment-HEP