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A search for $t\bar{t}$ resonances with the ATLAS detector in 2.05 fb$^{-1}$ of proton-proton collisions at $\sqrt{s}=7$ TeV

2012-07-26Journal article Open access
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dc.contributor.authorATLAS collaboration (2864 authors)
dc.contributor.authorAguilar-Saavedra, Juan Antonio
dc.contributor.authorAnjos, Nuno
dc.contributor.authorCantrill, Robert
dc.contributor.authorCarvalho, João
dc.contributor.authorCastro, Nuno Filipe
dc.contributor.authorConde Muiño, Patricia
dc.contributor.authorDa Cunha Sargedas De Sousa, Mario Jose
dc.contributor.authorDo Valle Wemans, André
dc.contributor.authorFiolhais, Miguel
dc.contributor.authorGomes, Agostinho
dc.contributor.authorGonçalo, Ricardo
dc.contributor.authorJorge, Pedro
dc.contributor.authorLopes, Lourenco
dc.contributor.authorMachado Miguens, Joana
dc.contributor.authorMaio, Amélia
dc.contributor.authorManeira, José
dc.contributor.authorOliveira, Miguel Alfonso
dc.contributor.authorOnofre, António
dc.contributor.authorPalma, Alberto
dc.contributor.authorPina, João Antonio
dc.contributor.authorPinto, Belmiro
dc.contributor.authorSantos, Helena
dc.contributor.authorSaraiva, João
dc.contributor.authorSilva, José
dc.contributor.authorVeloso, Filipe
dc.contributor.authorWolters, Helmut
dc.date.accessioned2019-02-03T20:00:32Z
dc.date.available2019-02-03T20:00:32Z
dc.date.issued2012-07-26
dc.date.updated2019-02-03T20:00:32Z
dc.description.abstractA 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 ttbar for narrow and wide resonances. For narrow Z' bosons, the observed 95% credibility level limits range from 9.3 pb to 0.95 pb for masses in the range of m_Z' = 500 GeV to m_Z' = 1300 GeV. The corresponding excluded mass region for a leptophobic topcolour Z' boson (Kaluza-Klein gluon excitation in the Randall-Sundrum model) is m_Z' < 880 GeV (m_{g_KK} < 1130 GeV).
dc.description.versionPeer Reviewed
dc.identifierEur.Phys.J. C72 (2012) 2083; DOI 10.1140/epjc/s10052-012-2083-1
dc.identifier.urihttp://dx.doi.org/10.1140/epjc/s10052-012-2083-1
dc.identifier.urihttp://hdl.handle.net/10400.26/26183
dc.language.isoeng
dc.titleA search for $t\bar{t}$ resonances with the ATLAS detector in 2.05 fb$^{-1}$ of proton-proton collisions at $\sqrt{s}=7$ TeV
dc.typejournal article
dspace.entity.typePublication
rcaap.rightsopenAccesspt
rcaap.typearticle

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