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Search for new particles decaying to ZZ using final states with leptons and jets with the ATLAS detector in root s=7 TeV proton-proton collisions
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
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Number of Authors: 3034
2012 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 712, no 4-5, 331-350 p.Article in journal (Refereed) Published
Abstract [en]

A search is presented for a narrow resonance decaying to a pair of Z bosons using data corresponding to 1.02 fb(-1) of integrated luminosity collected by the ATLAS experiment from pp collisions at root s= 7 TeV. Events containing either four charged leptons (llll) or two charged leptons and two jets (lljj) are analyzed and found to be consistent with the Standard Model background expectation. Lower limits on a resonance mass are set using the Randall-Sundrum (RS1) graviton model as a benchmark. Using both llll and lljj events, an RS1 graviton with k/(m) over bar (pl) = 0.1 and mass between 325 and 845 GeV is excluded at 95% confidence level. In addition, the llll events are used to set a model-independent fiducial cross section limit of sigma(fid)(pp -> X -> ZZ) < 0.92 pb at 95% confidence level for any new sources of ZZ production with m(ZZ) greater than 300 GeV.

Place, publisher, year, edition, pages
Elsevier, 2012. Vol. 712, no 4-5, 331-350 p.
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Physical Sciences
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URN: urn:nbn:se:kth:diva-99307DOI: 10.1016/j.physletb.2012.05.020ISI: 000305378200005Scopus ID: 2-s2.0-84861482907OAI: oai:DiVA.org:kth-99307DiVA: diva2:541870
Note
Author count: 3034.      QC 20120725Available from: 2012-07-25 Created: 2012-07-25 Last updated: 2017-12-07Bibliographically approved

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