| Auteurs | G. Aad, . et al, S. Bentvelsen, A.P. Colijn, A. Doxiadis, H. Garitaonandia, M. Gosselink, P. de Jong, M.S. Kayl, Z. van Kesteren, E. Koffeman, E. van der Kraaij, H.C. Lee, F. Linde, J. Mechnich, I. Mussche, L. de Nooij, J.P. Ottersbach, M. Tsiakiris, J.C. Vermeulen, M. Vreeswijk, I. van Vulpen, E. van der Poel, M. Rijpstra, N. Ruckstuhl | | Titel | Measurement of the ZZ production cross section and limits on anomalous neutral triple gauge couplings in proton-proton collisions at sqrt s = 7 TeV with the ATLAS detector |
| Tijdschrift | Physical Review Letters |
| Jaargang | 108 |
| Jaar | 2012 |
| Nummer | 4 |
| Pagina's | 041804- |
| ISSN | 00319007 |
| Faculteit | Faculteit der Natuurwetenschappen, Wiskunde en Informatica |
| Instituut/afd. | FNWI: Institute for High Energy Physics (IHEF) |
| Samenvatting | A measurement of the ZZ production cross section in proton-proton collisions at √s=7 TeV using data corresponding to an integrated luminosity of 1.02 fb-1 recorded by the ATLAS experiment at the LHC is presented. Twelve events containing two Z boson candidates decaying to electrons and/or muons are observed, with an expected background of 0.3±0.3(stat)-0.3+0.4(syst) events. The cross section measured in a phase-space region with good detector acceptance and for dilepton masses within the range 66 to 116 GeV is σZZ→ℓ+ℓ-ℓ+ℓ-fid=19.4-5.2+6.3(stat)-0.7+0.9(syst)±0.7(lumi) fb. The resulting total cross section for on-shell ZZ production, σZZtot=8.5-2.3+2.7(stat)-0.3+0.4(syst)±0.3(lumi) pb, is consistent with the standard model expectation of 6.5-0.2+0.3 pb calculated at the next-to-leading order in QCD. Limits on anomalous neutral triple gauge boson couplings are derived. |
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