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.

Search for t(t)over-barH production in the all-jet final state in proton-proton collisions root s=13 TeV / Sirunyan, A.M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., Brandstetter, J., Brondolin, E., Dragicevic, M., Eroe, J., Del Valle, A.E., Flechl, M., Friedl, M., Fruehwirth, R., Ghete, V.M., Grossmann, J., Hrubec, J., Jeitler, M., Koenig, A., Krammer, N., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - ELETTRONICO. - 6(2018). [10.1007/JHEP06(2018)101]

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

Creanza, D.;De Filippis, N.;Iaselli, G.;Maggi, G.;Pugliese, G.;
2018

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 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.
2018
Search for t(t)over-barH production in the all-jet final state in proton-proton collisions root s=13 TeV / Sirunyan, A.M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., Brandstetter, J., Brondolin, E., Dragicevic, M., Eroe, J., Del Valle, A.E., Flechl, M., Friedl, M., Fruehwirth, R., Ghete, V.M., Grossmann, J., Hrubec, J., Jeitler, M., Koenig, A., Krammer, N., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - ELETTRONICO. - 6(2018). [10.1007/JHEP06(2018)101]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/138600
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