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Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector

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arxiv 1806.00425 v2 pith:ITKRZRJT submitted 2018-06-01 hep-ex

Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector

classification hep-ex
keywords standardbosondeviationshiggsproductionassociationatlascorresponding
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The observation of Higgs boson production in association with a top quark pair ($t\bar{t}H$), based on the analysis of proton-proton collision data at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large Hadron Collider, is presented. Using data corresponding to integrated luminosities of up to 79.8 fb$^{-1}$, and considering Higgs boson decays into $b\bar{b}$, $WW^*$, $\tau\tau$, $\gamma\gamma$, and $ZZ^*$, the observed significance is 5.8 standard deviations, compared to an expectation of 4.9 standard deviations. Combined with the $t\bar{t}H$ searches using a dataset corresponding to integrated luminosities of 4.5 fb$^{-1}$ at 7 TeV and 20.3 fb$^{-1}$ at 8 TeV, the observed (expected) significance is 6.3 (5.1) standard deviations. Assuming Standard Model branching fractions, the total $t\bar{t}H$ production cross section at 13 TeV is measured to be 670 $\pm$ 90 (stat.) $^{+110}_{-100}$ (syst.) fb, in agreement with the Standard Model prediction.

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Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Search for $\textit{tH}$ production in the $ H \to \tau\tau$ decay mode, and a combination with other searches, using $\textit{pp}$ collisions at 13 TeV and 13.6 TeV with the ATLAS detector

    hep-ex 2026-07 accept novelty 6.0

    ATLAS's combined tH search, including a new H→ττ channel, measures μ_tH = 3.3 ± 1.6 times the SM, with 2.3σ observed significance and an observed 95% CL limit of 6.1×SM.

  2. Next-to-next-to-leading order event generation for $t\bar{t}H$ production with approximate two-loop amplitude

    hep-ph 2026-03 conditional novelty 6.0

    First NNLO+PS (MiNNLOPS) generator for ttH production, combining soft-Higgs and high-energy approximate two-loop amplitudes pointwise, with one-loop-level validation.

  3. Precision Measurements of Higgs Hadronic Decay Modes at the FCC-ee

    hep-ex 2025-11 unverdicted novelty 6.0

    FCC-ee projections show percent to per-mil precision on Higgs hadronic decay rates including first sensitivity to the rare H to strange-strange mode.

  4. Study of $t\bar{t}H$ and $tH$ production in the $H\to\tau\tau$ channel in $pp$ collisions at $\sqrt{s}=13$ TeV and 13.6 TeV with the ATLAS detector

    hep-ex 2026-07 conditional novelty 5.0

    Simultaneous measurement of ttH (mu=1.51) and tH (mu=-0.4) in fully hadronic H→tau tau final states at 13/13.6 TeV, consistent with the Standard Model.

  5. Probing the Higgs-top Yukawa interaction in the $t\bar{t}H$ and $tH$ processes using $H\rightarrow\gamma\gamma$ with the ATLAS detector

    hep-ex 2026-06 unverdicted novelty 5.0

    ATLAS measures ttH cross section times BR(H→γγ) at 1.13 SM with 164 fb⁻¹ at 13.6 TeV, sets tH limit at 6.2 SM, and combined with prior data excludes |α|>38° and purely CP-odd coupling at 5.8σ.