Search for new particles decaying to $Z Z$ using final states with leptons and jets with the ATLAS detector in $\sqrt{s}=7$ TeV proton-proton collisions

Tanasijczuk, Andres Jorge;ATLAS;et.al.
(2012) Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. 712, p. 331 (2012)

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Abstract
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 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¯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 σfid(pp→X→ZZ)<0.92pb at 95% confidence level for any new sources of ZZ production with mZZ greater than 300 GeV.
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Tanasijczuk, A. J., ATLAS, & et al. (2012). Search for new particles decaying to $Z Z$ using final states with leptons and jets with the ATLAS detector in $\sqrt{s}=7$ TeV proton-proton collisions. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 712, 331. https://doi.org/10.1016/j.physletb.2012.05.020 (Original work published 2012)