Measurement of the ZZ production cross section and search for the standard model Higgs boson in the four lepton final state in pp̅ collisions

Bertram, Iain and Borissov, Guennadi and Fox, Harald and Ratoff, Peter and Ross, Anthony and D0 Collaboration, The (2013) Measurement of the ZZ production cross section and search for the standard model Higgs boson in the four lepton final state in pp̅ collisions. Physical Review D – Particles and Fields, 88 (3). ISSN 1550-2368

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Abstract

We present a measurement of Z boson pair production in pp̅ collisions at 1.96 TeV with 9.6 to 9.8  fb-1 of D0 data. We examine the final states eeee, eeμμ, and μμμμ. Based on selected data, the measured cross section in the mass region M(Z/γ*)>30  GeV is σ(pp̅ →Z/γ*Z/γ*)=1.26-0.36+0.44(stat)-0.15+0.17(syst)±0.08(lumi)  pb; after correcting for the expected ratio of σ(pp̅ →Z/γ*Z/γ*) to σ(pp̅ →ZZ), we derive a cross section for pp̅ →ZZ production of 1.05-0.30+0.37(stat)-0.12+0.14(syst)±0.06(lumi)  pb. This result is combined with a previous result from the ZZ→ℓ+ℓ-νν̅ channel resulting in a combined pp̅ →ZZ cross section measurement of 1.32-0.25+0.29(stat)±0.12(syst)±0.04(lumi)  pb. These measurements are consistent with the standard model expectation of 1.43±0.10  pb. We extend this analysis to search for the standard model (SM) Higgs boson between 115 and 200 GeV. At a Higgs boson mass of 125 GeV, we expect to set a limit of 43 times the SM expectation at 95% C.L., and set a limit of 42 times the SM expectation at 95% C.L.

Item Type: Journal Article
Journal or Publication Title: Physical Review D – Particles and Fields
Additional Information: © 2013 American Physical Society
Departments: Faculty of Science and Technology > Physics
ID Code: 66110
Deposited By: ep_importer_pure
Deposited On: 19 Aug 2013 11:10
Refereed?: Yes
Published?: Published
Last Modified: 24 Feb 2020 01:43
URI: https://eprints.lancs.ac.uk/id/eprint/66110

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