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 sqrt{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 mathrm{t}overline{mathrm{t}}mathrm{H} signal from the irreducible mathrm{t}overline{mathrm{t}}+mathrm{b}overline{mathrm{b}} 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 widehat{mu}=0.9pm 0.7left(mathrm{stat}right)pm 1.3left(mathrm{syst}right)=0.9pm 1.5left(mathrm{tot}right) , and the observed and expected upper limits are, respectively, μ < 3.8 and < 3.1 at 95% confidence levels.
Published Version (Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.