Search for t(t)over-barH production in the all-jet final state in proton-proton collisions root s=13 TeV

Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Asilar, Ece and Md. Ali, Mohd. Adli (2018) Search for t(t)over-barH production in the all-jet final state in proton-proton collisions root s=13 TeV. Journal of High Energy Physics, 2018 (6). pp. 1-45. E-ISSN 1029-8479

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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 t¯tH signal from the irreducible t¯t + bb background, the analysis assigns leading order ¯ matrix element signal and background probability densities to each event. A likelihoodratio statistic based on these probability densities is used to extract the signal. The results are provided in terms of an observed t¯tH 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 ˆµ = 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.

Item Type:	Article (Journal)
Additional Information:	7861/70471
Uncontrolled Keywords:	Hadron-Hadron scattering (experiments), Higgs physics, Top physics
Subjects:	Q Science > Q Science (General) Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science Kulliyyah of Science > Department of Physics
Depositing User:	Dr Mohd Adli MD Ali
Date Deposited:	04 Feb 2019 17:12
Last Modified:	15 May 2019 12:36
URI:	http://irep.iium.edu.my/id/eprint/70471

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