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

By Atlas Collaboration. 2018

263 citations recorded by the source corpus.

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.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/34647a0f5365cb57165ba3bfa009c3292b3b89c7

Citations in the corpus

• Combined measurements of Higgs boson production and decay using up to $80$ fb$^{-1}$ of proton-proton collision data at $\sqrt{s}=$ 13 TeV collected with the ATLAS experiment (2019, unknown): “The H → γγ analysis [10,12] requires the presence of two isolated photons [123] within the pseudorapidity range jηj < 2.”
• The gauge-Higgs legacy of the LHC Run I (2016, unknown): “production decay ATLAS CMS h→WW [120,121] [122–124] h→ Z Z [121,125] [123,124,126,127] h→ γγ [128] [129] h→ ττ [121] [123,124,130] h→ Zγ [131] [132] WBF h→ inv [133] WBF h→ ττ [130] Vh h→ bb̄ [134] [135] Vh h→ ττ [136] Vh h→ inv [137] [138] Vh h→ bb̄ (mVh) [139] t t̄h h→ γγ [118] [129] t t̄h h→ Z Z ”