Search for t¯tH production in the H→bb¯decay channel with leptonic t¯t decays in proton-proton collisions at √s = 13 TeV
A search is presented for the associated production of a standard model Higgs boson with a top quark-antiquark pair (t¯tH), in which the Higgs boson decays into a b quark-antiquark pair, in proton-proton collisions at a centre-of-mass energy √ s = 13 TeV. The data correspond to an integrated lum...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English English |
| Published: |
Springer Verlag
2019
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/71730/ http://irep.iium.edu.my/71730/ http://irep.iium.edu.my/71730/ http://irep.iium.edu.my/71730/1/71730_Search%20for%20t%28t%29over-barH%20production%20in%20the%20H_article.pdf http://irep.iium.edu.my/71730/2/71730_Search%20for%20t%28t%29over-barH%20production%20in%20the%20H_wos.pdf http://irep.iium.edu.my/71730/3/71730_Search%20for%20t%28t%29over-barH%20production%20in%20the%20H_scopus.pdf |
| Summary: | A search is presented for the associated production of a standard model Higgs
boson with a top quark-antiquark pair (t¯tH), in which the Higgs boson decays into a b
quark-antiquark pair, in proton-proton collisions at a centre-of-mass energy √
s = 13 TeV.
The data correspond to an integrated luminosity of 35.9 fb−1
recorded with the CMS detector at the CERN LHC. Candidate t¯tH events are selected that contain either one or
two electrons or muons from the t¯t decays and are categorised according to the number
of jets. Multivariate techniques are employed to further classify the events and eventually
discriminate between signal and background. The results are characterised by an observed
t¯tH signal strength relative to the standard model cross section, µ = σ/σSM, under the
assumption of a Higgs boson mass of 125 GeV. A combined fit of multivariate discriminant
distributions in all categories results in an observed (expected) upper limit on µ of 1.5 (0.9)
at 95% confidence level, and a best fit value of 0.72±0.24(stat)±0.38(syst), corresponding
to an observed (expected) signal significance of 1.6 (2.2) standard deviations above the
background-only hypothesis. |
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