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Search for ZH -> l+l- bbar production in 9.7 fb-1 of ppbar collisions with the D0 detector

Abstract : We present a search for the standard model (SM) Higgs boson produced in association with a Z boson in 9.7 fb-1 of ppbar collisions collected with the D0 detector at the Fermilab Tevatron Collider at sqrt{s} = 1.96 TeV. Selected events contain one reconstructed Z -> e+e- or Z -> mu+mu- candidate and at least two jets, including at least one jet likely to contain a b quark. To validate the search procedure, we also measure the cross section for ZZ production, and find that it is consistent with the SM expectation. We set upper limits at the 95% C.L. on the product of the ZH production cross section and branching ratio B(H -> bbbar) for Higgs boson masses 90 <= M_H <= 150 GeV. The observed (expected) limit for M_H = 125 GeV is a factor of 7.1 (5.1) larger than the SM prediction.
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http://hal.in2p3.fr/in2p3-00801036
Contributor : Sylvie Flores <>
Submitted on : Friday, March 15, 2013 - 7:02:42 AM
Last modification on : Thursday, November 19, 2020 - 12:58:18 PM

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V.M. Abazov, U. Bassler, G. Bernardi, M. Besançon, D. Brown, et al.. Search for ZH -> l+l- bbar production in 9.7 fb-1 of ppbar collisions with the D0 detector. Physical Review D, American Physical Society, 2013, 88, pp.052010. ⟨10.1103/PhysRevD.88.052010⟩. ⟨in2p3-00801036⟩

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