Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/57549

TitleObservation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector
Author(s)Onofre, A.
Castro, Nuno Filipe
ATLAS Collaboration
Issue date2018
PublisherElsevier B.V.
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
CitationAaboud, M., Aad, G., Abbott, B., Abdinov, O., Abeloos, B., Abhayasinghe, D. K., . . . Zwalinski, L. (2018). Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector. [Article]. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 784, 173-191. doi: 10.1016/j.physletb.2018.07.035
Abstract(s)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.
TypeArticle
URIhttp://hdl.handle.net/1822/57549
DOI10.1016/j.physletb.2018.07.035
ISSN0370-2693
e-ISSN1873-2445
Peer-Reviewedyes
AccessOpen access
Appears in Collections:LIP - Artigos/papers

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