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Measurements of inclusive and differential fiducial cross-sections of t t ¯ $$ t\overline{t} $$ production with additional heavy-flavour jets in proton-proton collisions at √s = 13 TeV with the ATLAS detector

CollaborationWith : Akilli, Ece / Amrouche, Cherifa Sabrina / Ancu, Lucian Stefan / Benoit, Mathieu / Calace, Noemi / Clark, Allan Geoffrey / Della Volpe, Domenico / Di Bello, Francesco / Dubreuil, Arnaud / Ferrere, Didier / Gadatsch, Stefan / Golling, Tobias / Gonzalez Sevilla, Sergio / Iacobucci, Giuseppe / Iizawa, Tomoya / Jansky, Roland / Khoo, Teng Jian / Kiehn, Moritz / Lanfermann, Marie Christine / Lionti, Anthony Eric / March Ruiz, Luis / Mermod, Philippe / Nessi, Marzio / Paolozzi, Lorenzo / Poggi, Riccardo / Raine, Johnny / Salamani, Dalila / Schramm, Steven / Sfyrla, Anna / Sultan, D M S / Valente, Marco / Vicente Barreto Pinto, Mateus / Wu, Xin / Zaffaroni, Ettore
Published in Journal of High Energy Physics. 2019, vol. 1904, p. 046
Collection Open Access - SCOAP3
Abstract This paper presents measurements of t t ¯ $$ t\overline{t} $$ production in association with additional b -jets in pp collisions at the LHC at a centre-of-mass energy of 13 TeV. The data were recorded with the ATLAS detector and correspond to an integrated luminosity of 36.1 fb −1 . Fiducial cross-section measurements are performed in the dilepton and lepton-plus-jets t t ¯ $$ t\overline{t} $$ decay channels. Results are presented at particle level in the form of inclusive cross-sections of t t ¯ $$ t\overline{t} $$ final states with three and four b -jets as well as differential cross-sections as a function of global event properties and properties of b -jet pairs. The measured inclusive fiducial cross-sections generally exceed the t t ¯ b b ¯ $$ t\overline{t}b\overline{b} $$ predictions from various next-to-leading-order matrix element calculations matched to a parton shower but are compatible within the total uncertainties. The experimental uncertainties are smaller than the uncertainties in the predictions. Comparisons of state-of-the-art theoretical predictions with the differential measurements are shown and good agreement with data is found for most of them.
Keywords Hadron-Hadron scattering (experiments)Heavy quark production
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arXiv: 1811.12113
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ATLAS COLLABORATION. Measurements of inclusive and differential fiducial cross-sections of t t ¯ $$ t\overline{t} $$ production with additional heavy-flavour jets in proton-proton collisions at √s = 13 TeV with the ATLAS detector. In: Journal of High Energy Physics, 2019, vol. 1904, p. 046. https://archive-ouverte.unige.ch/unige:116883

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Deposited on : 2019-05-02

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