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, sa.6, 2018 (SCI-Expanded)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: Sayı: 6
- Basım Tarihi: 2018
- Doi Numarası: 10.1007/jhep06(2018)101
- Dergi Adı: JOURNAL OF HIGH ENERGY PHYSICS
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Anahtar Kelimeler: Hadron-Hadron scattering (experiments), Higgs physics, Top physics, HIGGS-BOSON PRODUCTION, DECAY, PLUS
- Çukurova Üniversitesi Adresli: Evet
Özet
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 root 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) over barH signal from the irreducible t (t) over bar + b (b) over bar 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 t (t) over barH signal strength relative to the standard model production cross section mu = sigma/sigma(SM), assuming a Higgs boson mass of 125 GeV. The best fit value is (mu) over cap = 0.9 +/- 0.7(stat) +/- 1.3(syst) = 0.9 +/- 1.5 (tot), and the observed and expected upper limits are, respectively, mu < 3.8 and < 3.1 at 95% confidence levels.