Improved Measurement of ttZ Couplings at the LHC

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dc.creatorBaur, U.
dc.creatorJuste, A.
dc.creatorRainwater, D.
dc.creatorOrr, L. H.
dc.date2005-12-20
dc.date.accessioned2026-07-07T11:58:40Z
dc.date.available2026-07-07T11:58:40Z
dc.descriptionWe consider QCD tt~Z production at the LHC with Z->\barννand all-hadronic tt~ decays, i.e. pp -> p_T(miss)bb~+4 jets, as a tool to measure ttZ couplings. This channel has a significantly larger cross section than those where the Z boson decays leptonically. However, tt~, bb~+4 jet, tt~j and tt~jj production give rise to potentially large backgrounds. We show that these processes can be suppressed to an acceptable level with suitable cuts, and find that adding the p_T(miss)bb~+4 jet channel to the final states used in previous ttZ couplings analyses will improve the sensitivity by 10-60%. We also discuss how the measurement of the ttZ couplings may constrain Little Higgs models.
dc.descriptionrevtex4, 16 pages, 4 figures, 1 table
dc.identifierhttps://arxiv.org/abs/hep-ph/0512262
dc.identifierhttp://arxiv.org/abs/hep-ph/0512262
dc.identifierPhys.Rev.D73:034016,2006
dc.identifierdoi:10.1103/PhysRevD.73.034016
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/206302
dc.subjectHigh Energy Physics - Phenomenology
dc.titleImproved Measurement of ttZ Couplings at the LHC
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