Search for the Standard Model Higgs boson in the decay channel H -> ZZ((*)) -> 4l with 4.8 fb(-1) of pp collision data at root s=7 TeV with ATLAS
Number of Authors: 3066
2012 (English)In: Physics Letters B, ISSN 0370-2693, Vol. 710, no 3, 383-402 p.Article in journal (Refereed) Published
This Letter presents a search for the Standard Model Higgs boson in the decay channel H -> ZZ((*)) -> l(+)l(-)l(-)+l(')-, where l,l' = e or mu, using proton-proton collisions at root s = 7 TeV recorded with the ATLAS detector and corresponding to an integrated luminosity of 4.8 fb(-1). The four-lepton invariant mass distribution is compared with Standard Model background expectations to derive upper limits on the cross section of a Standard Model Higgs boson with a mass between 110 GeV and 600 GeV. The mass ranges 134-156 GeV, 182-233 GeV, 256-265 GeV and 268-415 GeV are excluded at the 95% confidence level. The largest upward deviations from the background-only hypothesis are observed for Higgs boson masses of 125 GeV, 244 GeV and 500 GeV with local significances of 2.1, 2.2 and 2.1 standard deviations, respectively. Once the look-elsewhere effect is considered, none of these excesses are significant.
Place, publisher, year, edition, pages
2012. Vol. 710, no 3, 383-402 p.
IdentifiersURN: urn:nbn:se:kth:diva-101088DOI: 10.1016/j.physletb.2012.03.005ISI: 000303081900002ScopusID: 2-s2.0-84862776768OAI: oai:DiVA.org:kth-101088DiVA: diva2:546350
QC 20120823. Author count: 3066.2012-08-232012-08-23Bibliographically approved