Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/52067
Título : Search for resonant production of tt in 4.8  fb-1 of integrated luminosity of pp̅ collisions at √s=1.96  TeV
Autor : Aaltonen, T., Álvarez González, B., Casal, Bruno, Cuevas, Javier, Gómez-Ceballos, Guillelmo, Palencia, Enrique, Rodrigo, Teresa, Vila, Iván, Vilar, Rocío, Vizán, J., CDF Collaboration
Fecha de publicación : 2011
Citación : Physical Review D 84(7): 072004 (2011)
Resumen: We search for resonant production of tt pairs in 4.8  fb-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 tt candidate invariant mass is sampled. These probability density functions 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/c2 at 95% confidence level.
URI : http://hdl.handle.net/10261/52067
Identificadores: doi: 10.1103/PhysRevD.84.072004
issn: 0556-2821
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