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.
- Alconada Verzini, María Josefina
- Alonso, Francisco
- Arduh, Francisco Anuar
- Dova, Maria Teresa
- Hoya, Joaquín
- Monticelli, Fernando Gabriel
- Wahlberg, Hernan Pablo
- Bossio Sola, Jonathan David
- Daneri, María Florencia
- Devesa, Maria Roberta
- Marceca, Gino
- Otero y Garzon, Gustavo Javier
- Piegaia, Ricardo Nestor
- Sacerdoti, Sabrina
- Zinonos, Z.
- Zinser, M.
- Ziolkowski, M.
- Živković, L.
- Zobernig, G.
- Zoccoli, A.
- Zoch, K.
- Nedden, M. zur
- Zorbas, T. G.
- Zou, R.
- Zwalinski, L.
- The ATLAS Collaboration
DOIAbstract
The observation of Higgs boson production in association with a top quark pair ( tt¯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 bb¯ , WW⁎ , τ+τ− , γγ , and ZZ⁎ , the observed significance is 5.8 standard deviations, compared to an expectation of 4.9 standard deviations. Combined with the tt¯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 branc...
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