3,690 research outputs found

    Enhancing the heavy Higgs signal with jet-jet profile cuts

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    The jet-jet profile, or detailed manner, in which transverse energy and mass are distributed around the jet-jet system resulting from the hadronic decay of a ZZ boson in the process HiggsZZ\to ZZ at a proton-proton collider energy of 40\tev is carefully examined. Two observables are defined that can be used to help distinguish the +\ell^+\ell^--jet-jet signal from Higgs decay from the ``ordinary'' QCD background arising from the large transverse momentum production of single ZZ bosons plus the associated jets. By making cuts on these observables, signal to background enhancement factors greater than 100100 can be obtained.Comment: 16 pages, Univ. Florida IFT-93-

    Search for associated Higgs boson production using like charge dilepton events in p(p)over-bar collisions at root s=1.96 TeV

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    We present a search for associated Higgs boson production in the process p (p) over bar -> W/ZH -> l(+/-)l'(+/-) + X in ee, e mu, and mu mu final states. The search is based on data collected by the D0 experiment at the Fermilab Tevatron Collider at root s = 1.96 TeV corresponding to 5.3 fb(-1) of integrated luminosity. We require two isolated leptons (electrons or muons) with the same electric charge and additional kinematic requirements. No significant excess above background is observed, and we set 95% C. L. observed (expected) upper limits on ratio of the production cross section to the standard model prediction of 6.4 (7.3) for a Higgs boson mass of 165 GeV and 13.5 (19.8) for a mass of 115 GeV