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Search for High Mass Dilepton Resonances in pp Collisions at $\sqrt{s}=7$ TeV with the ATLAS Experiment
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). (Elementarpartikelfysik)
Stockholm University, Faculty of Science, Department of Physics. (Systemfysik)
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). (Elementarpartikelfysik)
Stockholm University, Faculty of Science, Department of Physics. (Systemfysik)
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2011 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 700, 163-180 p.Article in journal (Refereed) Published
Abstract [en]

This Letter presents a search for high mass e(+)e(-) or mu(+)mu(-) resonances in pp collisions at root s = 7 TeV at the LHC. The data were recorded by the ATLAS experiment during 2010 and correspond to a total integrated luminosity of similar to 40 pb(-1). No statistically significant excess above the Standard Model expectation is observed in the search region of dilepton invariant mass above 110 GeV. Upper limits at the 95% confidence level are set on the cross section times branching ratio of Z' resonances decaying to dielectrons and dimuons as a function of the resonance mass. A lower mass limit of 1.048 TeV on the Sequential Standard Model Z' boson is derived, as well as mass limits on Z* and E(6)-motivated Z' models.

Place, publisher, year, edition, pages
2011. Vol. 700, 163-180 p.
Keyword [en]
Grand unified theory; Narrow resonance; New gauge boson; Z '; Dilepton; Mass spectrum
National Category
Subatomic Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:su:diva-62997DOI: 10.1016/j.physletb.2011.04.044ISI: 000292586400002OAI: oai:DiVA.org:su-62997DiVA: diva2:446317
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Atlas
Funder
Swedish Research CouncilKnut and Alice Wallenberg Foundation
Note
Publikationen har totalt 3045 författare, G. Aad et al.Available from: 2011-10-06 Created: 2011-10-06 Last updated: 2017-12-08Bibliographically approved

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Åsman, BarbroBohm, ChristianClément, ChristopheEriksson, DanielGellerstedt, KarlHellman, StenHidvégi, AttilaHolmgren, Sven-OlofJohansson, ErikJon-And, KerstinLundberg, JohanMilstead, DavidMoa, TorbjörnNordkvist, BjörnOhm, ChristianPapadelis, ArasSilverstein, SamuelSjölin, JörgenStrandberg, SaraTylmad, MajaYang, Zhaoyu
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Department of PhysicsThe Oskar Klein Centre for Cosmo Particle Physics (OKC)
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Physics Letters B
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