We search for resonant production of t (t) over bar pairs in 4.8 fb(-1) integrated luminosity of p (p) over bar collision data at root 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 t (t) over bar candidate invariant mass is sampled. These probability density functions are used to construct a likelihood function, whereby the cross section for resonant t (t) over bar production is estimated, given a hypothetical resonance mass and width. The data indicate no evidence of resonant production of t (t) over bar pairs. A benchmark model of leptophobic Z' -> t (t) over bar is excluded with m(Z') < 900 GeV/c(2) at 95% confidence level.

T., A., B., A.G., S., A., D., A., A., A., A., A., et al. (2011). Search for resonant production of t(t)over-bar pairs in 4.8 fb(-1) of integrated luminosity of p(p)over-bar collisions at root s=1.96 TeV. PHYSICAL REVIEW. D. PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 84(7) [10.1103/PhysRevD.84.072004].

Search for resonant production of t(t)over-bar pairs in 4.8 fb(-1) of integrated luminosity of p(p)over-bar collisions at root s=1.96 TeV

BARRIA, PATRIZIA;GAROSI, PAOLA;MAESTRO, PAOLO;RUFFINI, FABRIZIO;SCRIBANO, ANGELO;SQUILLACIOTI, PAOLA;
2011-01-01

Abstract

We search for resonant production of t (t) over bar pairs in 4.8 fb(-1) integrated luminosity of p (p) over bar collision data at root 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 t (t) over bar candidate invariant mass is sampled. These probability density functions are used to construct a likelihood function, whereby the cross section for resonant t (t) over bar production is estimated, given a hypothetical resonance mass and width. The data indicate no evidence of resonant production of t (t) over bar pairs. A benchmark model of leptophobic Z' -> t (t) over bar is excluded with m(Z') < 900 GeV/c(2) at 95% confidence level.
2011
T., A., B., A.G., S., A., D., A., A., A., A., A., et al. (2011). Search for resonant production of t(t)over-bar pairs in 4.8 fb(-1) of integrated luminosity of p(p)over-bar collisions at root s=1.96 TeV. PHYSICAL REVIEW. D. PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 84(7) [10.1103/PhysRevD.84.072004].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/12203
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