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Verlagsausgabe
DOI: 10.5445/IR/1000084652
Veröffentlicht am 30.07.2018

Search for $ \mathrm{t}\overline{\mathrm{t}}\mathrm{H} $ production in the all-jet final state in proton-proton collisions at $ \sqrt{s}=13 $ TeV

CMS Collaboration; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Ambrogi, F.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Brondolin, E.; Dragicevic, M.; Erö, J.; Escalante Del Valle, A.; Flechl, M.; Friedl, M.; Frühwirth, R.; Ghete, V. M.; Grossmann, J.; Hrubec, J.; Jeitler, M.; König, A.; Krammer, N.; ... mehr

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 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 t t ¯ H tt¯H signal from the irreducible t t ¯ + b b ¯ tt¯+bb¯ 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 / σ SM , assuming a Higgs boson mass of 125 GeV. The best fit value is μ ^ = 0.9 ± 0.7 stat ± 1.3 syst = 0.9 ± 1.5 tot 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.


Zugehörige Institution(en) am KIT Institut für Experimentelle Teilchenphysik (ETP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 1029-8479
URN: urn:nbn:de:swb:90-846528
KITopen ID: 1000084652
Erschienen in Journal of high energy physics
Band 2018
Heft 6
Seiten Article: 101
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Vorab online veröffentlicht am 20.06.2018
Schlagworte Hadron-Hadron scattering (experiments), Higgs physics, Top physics
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