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A search for t (t)over-bar resonances with the ATLAS detector in 2.05 fb(-1) of proton-proton collisions at root s=7 TeV

Aad G.
•
Abbott B.
•
Abdallah J.
altro
Zwalinski L.
2012
  • journal article

Periodico
THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS
Abstract
A search for top quark pair resonances in final states containing at least one electron or muon has been performed with the ATLAS experiment at the CERN Large Hadron Collider. The search uses a data sample corresponding to an integrated luminosity of 2.05 fb−1, which was recorded in 2011 at a proton-proton centre-of-mass energy of 7 TeV. No evidence for a resonance is found and limits are set on the production cross-section times branching ratio to tt for narrow and wide resonances. For narrow Z′ bosons, the observed 95 % Bayesian credibility level limits range from 9.3 pb to 0.95 pb for masses in the range of mZ′ = 500 GeV to mZ ′= 1300 GeV. The corresponding excluded mass region for a leptophobic topcolour Z′ boson (Kaluza-Klein gluon excitation in the Randall-Sundrum model) is mZ < 880 GeV (mgKK < 1130 GeV).
DOI
10.1140/epjc/s10052-012-2083-1
WOS
WOS:000307269400029
Archivio
http://hdl.handle.net/11390/883402
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84865462061
Diritti
metadata only access
Scopus© citazioni
26
Data di acquisizione
Jun 7, 2022
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Web of Science© citazioni
24
Data di acquisizione
Mar 12, 2024
Visualizzazioni
1
Data di acquisizione
Apr 19, 2024
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