This paper reports a search for nonstandard model topquark resonances, Z', decaying to t (t) over bar -> W(+)bW(-)(b) over bar, where both W decay to quarks. We examine the top-antitop quark invariant mass spectrum for the presence of narrow resonant states. The search uses a data sample of p (p) over bar collisions at a center of mass energy of 1.96 TeV collected by the CDF II detector at the Fermilab Tevatron, with an integrated luminosity of 2.8 fb(-1). No evidence for top-antitop quark resonant production is found. We place upper limits on the production cross section times branching ratio for a specific topcolor assisted technicolor model in which the Z' has a width of Gamma(Z') = 0.012M(Z'). Within this model, we exclude a Z' boson with masses below 805 GeV/c(2) at the 95% confidence level.

T., A., B., Á.G., S., A., D., A., A., A., A., A., et al. (2011). Search for resonant production of t(t)over-bar decaying to jets in p(p)over-bar collisions at root s=1.96 TeV. PHYSICAL REVIEW. D. PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 84(7), 072003-1-072003-9 [10.1103/PhysRevD.84.072003].

Search for resonant production of t(t)over-bar decaying to jets in p(p)over-bar collisions at root s=1.96 TeV

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

Abstract

This paper reports a search for nonstandard model topquark resonances, Z', decaying to t (t) over bar -> W(+)bW(-)(b) over bar, where both W decay to quarks. We examine the top-antitop quark invariant mass spectrum for the presence of narrow resonant states. The search uses a data sample of p (p) over bar collisions at a center of mass energy of 1.96 TeV collected by the CDF II detector at the Fermilab Tevatron, with an integrated luminosity of 2.8 fb(-1). No evidence for top-antitop quark resonant production is found. We place upper limits on the production cross section times branching ratio for a specific topcolor assisted technicolor model in which the Z' has a width of Gamma(Z') = 0.012M(Z'). Within this model, we exclude a Z' boson with masses below 805 GeV/c(2) at the 95% confidence level.
2011
T., A., B., Á.G., S., A., D., A., A., A., A., A., et al. (2011). Search for resonant production of t(t)over-bar decaying to jets in p(p)over-bar collisions at root s=1.96 TeV. PHYSICAL REVIEW. D. PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 84(7), 072003-1-072003-9 [10.1103/PhysRevD.84.072003].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/21219
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