Search for tt̄H production in the all-jet final state in proton-proton collisions at √s= 13 TeV
Abstract
A search is presented for the associated production of a Higgs boson with a top quark pair in the all-jet final state. Events containing seven or more jets are selected from a sample of proton-proton collisions at √s=13 TeV collected with the CMS detector at the LHC in 2016, corresponding to an integrated luminosity of 35.9 fb−1. To separate the tt̄H signal from the irreducible tt̄+bb̄ background, the analysis assigns leading order matrix element signal and background probability densities to each event. A likelihood-ratio statistic based on these probability densities is used to extract the signal. The results are provided in terms of an observed ttH signal strength relative to the standard model production cross section μ = σ/σSM, assuming a Higgs boson mass of 125 GeV. The best fit value is μˆ=0.9±0.7(stat)±1.3(syst)=0.9±1.5(tot), and the observed and expected upper limits are, respectively, μ < 3.8 and < 3.1 at 95% confidence levels. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000314451Publication status
publishedExternal links
Journal / series
Journal of High Energy PhysicsVolume
Pages / Article No.
Publisher
SpringerSubject
Hadron-Hadron scattering (experiments); Higgs physics; Top physicsOrganisational unit
03593 - Dissertori, Günther / Dissertori, Günther
03904 - Wallny, Rainer / Wallny, Rainer
08803 - Grab, Christoph (Tit.Prof.)
09631 - Shchutska, Lesya (ehemalig) / Shchutska, Lesya (former)
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