Measurement of the Higgs boson production rate in association with top quarks in final states with electrons, muons, and hadronically decaying tau leptons at $\sqrt{s}=$ 13 TeV

Abstract

The rate for Higgs (H) bosons production in association with either one (tH) or two ($\mathrm{t}\bar{\mathrm{t}}$H) top quarks is measured in final states containing multiple electrons, muons, or tau leptons decaying to hadrons and a neutrino, using proton-proton collisions recorded at a center-of-mass energy of 13 TeV by the CMS experiment. The analyzed data correspond to an integrated luminosity of 137 fb${}^{-1}$. The analysis is aimed at events that contain H $\to$ WW, H $\to$ $\tau \tau$, or H $\to$ ZZ decays and each of the top quark(s) decays either to lepton+jets or all-jet channels. Sensitivity to signal is maximized by including ten signatures in the analysis, depending on the lepton multiplicity. The separation among the tH, the $\mathrm{t}\bar{\mathrm{t}}$H, and the backgrounds is enhanced through machine-learning techniques and matrix-element methods. The measured production rates for the $\mathrm{t}\bar{\mathrm{t}}$H and tH signals correspond to 0.92 $\pm$ 0.19 (stat) ${}_{-0.13}^{+0.17}$ (syst) and 5.7 $\pm$ 2.7 (stat) $\pm$ 3.0 (syst) of their respective standard model (SM) expectations. The corresponding observed (expected) significance amounts to 4.7 (5.2) standard deviations for $\mathrm{t}\bar{\mathrm{t}}$H, and to 1.4 (0.3) for tH production. Assuming that the Higgs boson coupling to the tau lepton is equal in strength to its expectation in the SM, the coupling $y_{\mathrm{t}}$ of the Higgs boson to the top quark divided by its SM expectation, ${\kappa }_{\mathrm{t}}$ = $y_{\mathrm{t}}/y_{\mathrm{t}}^{\mathrm{SM}}$, is constrained to be within $-$0.9 $<$ ${\kappa }_{\mathrm{t}}$ $<$ $-$0.7 or 0.7 $<$ ${\kappa }_{\mathrm{t}}$ $<$ 1.1, at 95% confidence level. This result is the most sensitive measurement of the $\mathrm{t}\bar{\mathrm{t}}$H production rate to date.

Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/HIG-19-008 (CMS Public Pages)

References in corpus (26)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• An Introduction to PYTHIA 8.2
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions
• Particle-flow reconstruction and global event description with the CMS detector
• Pileup subtraction using jet areas
• Vector boson pair production at the LHC
• The CMS trigger system
• Automatic spin-entangled decays of heavy resonances in Monte Carlo simulations
• The Catchment Area of Jets
• Combined results of searches for the standard model Higgs boson in pp collisions at sqrt(s) = 7 TeV
• Jet energy scale and resolution in the CMS experiment in pp collisions at 8 TeV
• FEWZ 2.0: A code for hadronic Z production at next-to-next-to-leading order
• Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at sqrt(s) = 8 TeV
• Performance of missing transverse momentum reconstruction in proton-proton collisions at $\sqrt{s}=$ 13 TeV using the CMS detector
• Measurements of properties of the Higgs boson decaying into the four-lepton final state in pp collisions at sqrt(s) = 13 TeV
• Pileup subtraction for jet shapes
• Efficient Identification of Boosted Semileptonic Top Quarks at the LHC
• Search for the associated production of the Higgs boson with a top-quark pair
• tWH associated production at the LHC
• $CP$ Properties of Higgs Boson Interactions with Top Quarks in the $t\bar{t}H$ and $tH$ Processes Using $H\to \gamma \gamma$ with the ATLAS Detector
• Search for $H\to \gamma \gamma$ produced in association with top quarks and constraints on the Yukawa coupling between the top quark and the Higgs boson using data taken at 7 TeV and 8 TeV with the ATLAS detector
• On the maximal use of Monte Carlo samples: re-weighting events at NLO accuracy
• Exploring Theory Space with Monte Carlo Reweighting

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• Les Houches 2021: Physics at TeV Colliders: Report on the Standard Model Precision Wishlist
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• NLO QCD corrections to full off-shell production of $t\bar{t}Z$ including leptonic decays
• Constraints on the Higgs boson self-coupling from the combination of single and double Higgs boson production in proton-proton collisions at $\sqrt{s}$ = 13 TeV
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• Constraints on Higgs boson production with large transverse momentum using $H\to b\bar{b}$ decays in the ATLAS detector
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• The Hierarchy Problem and the Top Yukawa: An Alternative to Top Partner Solutions
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• Search for new Higgs bosons via same-sign top quark pair production in association with a jet in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Muon identification using multivariate techniques in the CMS experiment in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Treatment of top-quark backgrounds in extreme phase spaces: the "top $p_T$ reweighting" and novel data-driven estimations in ATLAS and CMS
• Composite Higgs revealed in Higgs pair photo-production at future colliders
• Generic tests of CP-violation in high-$p_{\text{T}}$ multi-lepton signals at the LHC and beyond
• Advances in Multi-Variate Analysis Methods for New Physics Searches at the Large Hadron Collider
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• Prospects for Higgs boson and new scalar resonant production searches in ttbb final state at the LHC
• $t\bar{t}{W}^{\pm }$ at NLO accuracy with realistic final states
• Search for bottom quark associated production of the standard model Higgs boson in final states with leptons in proton-proton collisions at $\sqrt{s}$ = 13 TeV