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

Aaboud, M, Aad, G, Abbott, B, Abdinov, O, Abeloos, B, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H
et al (show 2910 more authors) (2018) Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector. PHYSICS LETTERS B, 784. 173 - 191.

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## Abstract

The observation of Higgs boson production in association with a top quark pair (), 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 , ⁎ , , γγ, and ⁎ , the observed significance is 5.8 standard deviations, compared to an expectation of 4.9 standard deviations. Combined with the 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 production cross section at 13 TeV is measured to be 670 ± 90 (stat.) (syst.) fb, in agreement with the Standard Model prediction.

Item Type: Article Symplectic Admin 10 Sep 2018 06:44 09 May 2021 09:48 10.1016/j.physletb.2018.07.035 https://www.sciencedirect.com/science/article/pii/... https://livrepository.liverpool.ac.uk/id/eprint/3025941