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

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

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)...

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Veröffentlicht in:Physics letters. B 2012-06, Vol.712 (4-5), p.331-350
Hauptverfasser: Aad, G., Allwood-Spiers, S.E., Asai, S., Ay, C., Bachacou, H., Backes, M., Barbaro Galtieri, A., Barklow, T., Bingul, A., Bold, T., Bucci, F., Bunse, M., Calafiura, P., Carter, A.A., Chelkov, G.A., Chen, H., Clemens, J.C., Colijn, A.P., Conidi, M.C., Czyczula, Z., DʼOnofrio, M., Dearnaley, W.J., Doglioni, C., Errede, D., Febbraro, R., Feligioni, L., Formica, A., Gao, Y.S., Gilbert, L.M., Göpfert, T., Göttfert, T., Gomez Fajardo, L.S., Gonzalez Parra, G., Grau, N., Grybel, K., Gwilliam, C.B., Harrison, K., Hirose, M., Houlden, M.A., Huston, J., Ikeno, M., Ishikawa, A., Ji, H., Jon-And, K., Kaczmarska, A., Kado, M., Kaushik, V., Keil, M., Knobloch, J., Krieger, P., Kruchonak, U., Lane, J.L., Lou, X., Macana Goia, J.A., Manousakis-Katsikakis, A., Marshall, Z., Martin, J.P., Massaro, G., McCarn, A., Mclaughlan, T., Meroni, C., Mitrofanov, G.Y., Nelson, T.K., Nemethy, P., Neubauer, M.S., Nikolic-Audit, I., Nugent, I.M., Odaka, S., Oh, A., Ouraou, A., Papadopoulou, Th.D., Ping, J., Pomeroy, D., Primavera, M., Randrianarivony, K., Reinherz-Aronis, E., Rousseau, D., Sandstroem, R., Santonico, R., Scannicchio, D.A., Schmidt, E., Sherman, D., Shrestha, S., Skovpen, K., Solc, J., Solodkov, A.A., Stark, J., Teixeira Dias Castanheira, M., Tua, A., Veneziano, S., Viel, S., Vinek, E., Vinogradov, V.B., Virzi, J., Vitells, O., von Toerne, E., Watson, M.F., Williams, E., Zhuang, X., zur Nedden, M.
Format: Artikel
Sprache:eng
Schlagworte:
Exact sciences and technology
Nuclear physics
Physics
The physics of elementary particles and fields
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Beschreibung
Zusammenfassung: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)
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2012.05.020