Search for new particles decaying to ZZ using final states with leptons and jets with the ATLAS detector in √s = 7 TeV proton–proton collisions
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Aad-2012-Search for new parti.pdf
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1.35 MB
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c16ad4a8808e63d812095a81bfd42d7f
Author(s)
Taylor, Frank E.
Date Issued
May 2012
Journal
Physics Letters B
Publisher
Elsevier
Citation
Aad, G., B. Abbott, J. Abdallah, A.A. Abdelalim, A. Abdesselam, O. Abdinov, B. Abi, et al. “Search for New Particles Decaying to ZZ Using Final States with Leptons and Jets with the ATLAS Detector in √s = 7 TeV Proton–proton Collisions.” Physics Letters B 712, no. 4–5 (June 2012): 331–350. © 2012 CERN
Version
Final published version
Abstract
A search is presented for a narrow resonance decaying to a pair of Z bosons using data corresponding to 1.02 fb[superscript −1] of integrated luminosity collected by the ATLAS experiment from pp collisions at √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/[bar over m][subscript 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 σ[subscript fid](pp→X→ZZ) < 0.92 pb at 95% confidence level for any new sources of ZZ production with m[subscript ZZ] greater than 300 GeV.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1016/j.physletb.2012.05.020
