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Measurement of $\mathrm{t\overline{t}H}$ production in the $\mathrm{H\rightarrow b\overline{b}}$ decay channel in $41.5\,\mathrm{fb}^{-1}$ of proton-proton collision data at $\sqrt{s}=13\,\mathrm{TeV}$
A measurement of the associated production of a standard model Higgs boson with a top quark-antiquark pair ($\mathrm{t\overline{t}H}$) in proton-proton collisions at $\sqrt{s}=13\,\mathrm{TeV}$ is presented. The result is based on data recorded with the CMS detector at the CERN LHC in 2017 and corre...
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2019
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Acceso en línea: | http://cds.cern.ch/record/2675023 |
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author | CMS Collaboration |
author_facet | CMS Collaboration |
author_sort | CMS Collaboration |
collection | CERN |
description | A measurement of the associated production of a standard model Higgs boson with a top quark-antiquark pair ($\mathrm{t\overline{t}H}$) in proton-proton collisions at $\sqrt{s}=13\,\mathrm{TeV}$ is presented. The result is based on data recorded with the CMS detector at the CERN LHC in 2017 and corresponds to an integrated luminosity of $41.5\,\mathrm{fb}^{-1}$. Candidate $\mathrm{t\overline{t}H}$ events are selected based on the number of leptons in the event, targeting all $\mathrm{t\overline{t}}$ decay channels, and are categorised according to the number of jets. Multivariate analysis techniques are employed to further categorise the events and eventually discriminate between signal and background. A combined fit of multivariate discriminant distributions in all categories results in a best fit value of the $\mathrm{t\overline{t}H}$ signal strength relative to the standard model cross section, $\mu = \sigma/\sigma_{\mathrm{SM}}$, of $\hat{\mu} = 1.49\,{}^{+0.21}_{-0.20}\mathrm{(stat)}\,{}^{+0.39}_{-0.35}\mathrm{(syst)}$, corresponding to an observed (expected) significance of 3.7 (2.6) standard deviations. Combined with previous results obtained with $35.9\,\mathrm{fb}^{-1}$ of data recorded in 2016, a best-fit value of $\hat{\mu} = 1.15\,{}^{+0.15}_{-0.15}\mathrm{(stat)}\,{}^{+0.28}_{-0.25}\mathrm{(syst)}$ is found, corresponding to an observed (expected) significance of 3.9 (3.5) standard deviations above the background-only hypothesis.
$$\textit{This document has been revised with respect to the version dated May 19, 2019.}$$ |
id | cern-2675023 |
institution | Organización Europea para la Investigación Nuclear |
publishDate | 2019 |
record_format | invenio |
spelling | cern-26750232019-09-30T06:29:59Zhttp://cds.cern.ch/record/2675023CMS CollaborationMeasurement of $\mathrm{t\overline{t}H}$ production in the $\mathrm{H\rightarrow b\overline{b}}$ decay channel in $41.5\,\mathrm{fb}^{-1}$ of proton-proton collision data at $\sqrt{s}=13\,\mathrm{TeV}$Particle Physics - ExperimentA measurement of the associated production of a standard model Higgs boson with a top quark-antiquark pair ($\mathrm{t\overline{t}H}$) in proton-proton collisions at $\sqrt{s}=13\,\mathrm{TeV}$ is presented. The result is based on data recorded with the CMS detector at the CERN LHC in 2017 and corresponds to an integrated luminosity of $41.5\,\mathrm{fb}^{-1}$. Candidate $\mathrm{t\overline{t}H}$ events are selected based on the number of leptons in the event, targeting all $\mathrm{t\overline{t}}$ decay channels, and are categorised according to the number of jets. Multivariate analysis techniques are employed to further categorise the events and eventually discriminate between signal and background. A combined fit of multivariate discriminant distributions in all categories results in a best fit value of the $\mathrm{t\overline{t}H}$ signal strength relative to the standard model cross section, $\mu = \sigma/\sigma_{\mathrm{SM}}$, of $\hat{\mu} = 1.49\,{}^{+0.21}_{-0.20}\mathrm{(stat)}\,{}^{+0.39}_{-0.35}\mathrm{(syst)}$, corresponding to an observed (expected) significance of 3.7 (2.6) standard deviations. Combined with previous results obtained with $35.9\,\mathrm{fb}^{-1}$ of data recorded in 2016, a best-fit value of $\hat{\mu} = 1.15\,{}^{+0.15}_{-0.15}\mathrm{(stat)}\,{}^{+0.28}_{-0.25}\mathrm{(syst)}$ is found, corresponding to an observed (expected) significance of 3.9 (3.5) standard deviations above the background-only hypothesis. $$\textit{This document has been revised with respect to the version dated May 19, 2019.}$$CMS-PAS-HIG-18-030oai:cds.cern.ch:26750232019 |
spellingShingle | Particle Physics - Experiment CMS Collaboration Measurement of $\mathrm{t\overline{t}H}$ production in the $\mathrm{H\rightarrow b\overline{b}}$ decay channel in $41.5\,\mathrm{fb}^{-1}$ of proton-proton collision data at $\sqrt{s}=13\,\mathrm{TeV}$ |
title | Measurement of $\mathrm{t\overline{t}H}$ production in the $\mathrm{H\rightarrow b\overline{b}}$ decay channel in $41.5\,\mathrm{fb}^{-1}$ of proton-proton collision data at $\sqrt{s}=13\,\mathrm{TeV}$ |
title_full | Measurement of $\mathrm{t\overline{t}H}$ production in the $\mathrm{H\rightarrow b\overline{b}}$ decay channel in $41.5\,\mathrm{fb}^{-1}$ of proton-proton collision data at $\sqrt{s}=13\,\mathrm{TeV}$ |
title_fullStr | Measurement of $\mathrm{t\overline{t}H}$ production in the $\mathrm{H\rightarrow b\overline{b}}$ decay channel in $41.5\,\mathrm{fb}^{-1}$ of proton-proton collision data at $\sqrt{s}=13\,\mathrm{TeV}$ |
title_full_unstemmed | Measurement of $\mathrm{t\overline{t}H}$ production in the $\mathrm{H\rightarrow b\overline{b}}$ decay channel in $41.5\,\mathrm{fb}^{-1}$ of proton-proton collision data at $\sqrt{s}=13\,\mathrm{TeV}$ |
title_short | Measurement of $\mathrm{t\overline{t}H}$ production in the $\mathrm{H\rightarrow b\overline{b}}$ decay channel in $41.5\,\mathrm{fb}^{-1}$ of proton-proton collision data at $\sqrt{s}=13\,\mathrm{TeV}$ |
title_sort | measurement of $\mathrm{t\overline{t}h}$ production in the $\mathrm{h\rightarrow b\overline{b}}$ decay channel in $41.5\,\mathrm{fb}^{-1}$ of proton-proton collision data at $\sqrt{s}=13\,\mathrm{tev}$ |
topic | Particle Physics - Experiment |
url | http://cds.cern.ch/record/2675023 |
work_keys_str_mv | AT cmscollaboration measurementofmathrmtoverlinethproductioninthemathrmhrightarrowboverlinebdecaychannelin415mathrmfb1ofprotonprotoncollisiondataatsqrts13mathrmtev |