Search for t(t)over-bar resonances in the lepton plus jets final state with ATLAS using 4.7 fb(-1) of pp collisions at root s=7 TeV

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dc.contributor.author Aad, G.
dc.contributor.author Abajyan, T.
dc.contributor.author Abbott, B.
dc.contributor.author Abdallah, J.
dc.contributor.author Khalek, S.
dc.contributor.author Abdelalim, A.
dc.contributor.author Abdinov, O.
dc.contributor.author Aben, R.
dc.contributor.author Abi, B.
dc.contributor.author Abolins, M.
dc.contributor.author AbouZeid, O.
dc.contributor.author Abramowicz, H.
dc.contributor.author Abreu, H.
dc.contributor.author Abulaiti, Y.
dc.contributor.author Acharya, B.
dc.contributor.author Adamczyk, L.
dc.contributor.author Adams, D.
dc.contributor.author Addy, T.
dc.contributor.author Adelman, J.
dc.contributor.author Adomeit, S.
dc.contributor.author Adragna, P.
dc.contributor.author Adye, T.
dc.contributor.author Aefsky, S.
dc.contributor.author Aguilar-Saavedra, J.
dc.contributor.author Agustoni, M.
dc.contributor.author Ahlen, S.
dc.contributor.author Ahles, F.
dc.contributor.author Ahmad, A.
dc.contributor.author Ahsan, M.
dc.contributor.author Aielli, G.
dc.contributor.author kesson, Torsten
dc.contributor.author Akimoto, G.
dc.contributor.author Akimov, A.
dc.contributor.author Alam, M.
dc.contributor.author Albert, J.
dc.contributor.author Albrand, S.
dc.contributor.author Aleksa, M.
dc.contributor.author Aleksandrov, I.
dc.contributor.author Alessandria, F.
dc.contributor.author Alexa, C.
dc.contributor.author Alexander, G.
dc.contributor.author Alexandre, G.
dc.contributor.author Alexopoulos, T.
dc.contributor.author Alhroob, M.
dc.contributor.author Aliev, M.
dc.contributor.author Alimonti, G.
dc.contributor.author Alison, J.
dc.contributor.author Allbrooke, B.
dc.contributor.author Allison, L.
dc.contributor.author Allport, P.
dc.contributor.author Allwood-Spiers, S.
dc.date.accessioned 2019-01-17T19:55:45Z
dc.date.available 2019-01-17T19:55:45Z
dc.date.issued 2013
dc.identifier.citation Phys. Rev. D. 88, 012004
dc.identifier.issn 1550-7998
dc.identifier.uri https://hdl.handle.net/10192/36252
dc.description.abstract A search for new particles that decay into top quark pairs (t (t) over bar) is performed with the ATLAS experiment at the LHC using an integrated luminosity of 4.7 fb(-1) of proton-proton (pp) collision data collected at a center-of-mass energy root s = 7 TeV. In the t (t) over bar) -> WbWb decay, the lepton plus jets final state is used, where one W boson decays leptonically and the other hadronically. The t (t) over bar) system is reconstructed using both small-radius and large-radius jets, the latter being supplemented by a jet substructure analysis. A search for local excesses in the number of data events compared to the Standard Model expectation in the t (t) over bar) invariant mass spectrum is performed. No evidence for a t (t) over bar) resonance is found and 95% credibility-level limits on the production rate are determined for massive states predicted in two benchmark models. The upper limits on the cross section times branching ratio of a narrow Z' resonance range from 5.1 pb for a boson mass of 0.5 TeV to 0.03 pb for a mass of 3 TeV. A narrow leptophobic topcolor Z' resonance with a mass below 1.74 TeV is excluded. Limits are also derived for a broad color-octet resonance with m 15.3%. A Kaluza-Klein excitation of the gluon in a Randall-Sundrum model is excluded for masses below 2.07 TeV.
dc.format.extent 1 file
dc.language English
dc.language.iso eng
dc.publisher American Physical Society
dc.relation.isversionof https://dx.doi.org/10.1103/PhysRevD.88.012004
dc.rights Creative Commons Attribution 3.0 Unported
dc.rights.uri http://creativecommons.org/licenses/by/3.0/
dc.subject Production Cross-Section
dc.subject Parton Distributions
dc.subject Hadron-Collisions
dc.subject Pair Production
dc.subject LHC
dc.subject Algorithms
dc.subject Detector
dc.subject Channel
dc.subject Production Cross-Section
dc.subject Parton Distributions
dc.subject Hadron-Collisions
dc.subject Pair Production
dc.subject LHC
dc.subject Algorithms
dc.subject Detector
dc.subject Channel
dc.subject article
dc.title Search for t(t)over-bar resonances in the lepton plus jets final state with ATLAS using 4.7 fb(-1) of pp collisions at root s=7 TeV
dc.type Article
dc.contributor.department Department of Physics
dc.relation.journal Physical Review D - Particles, Fields, Gravitation, and Cosmology


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