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

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

ATLAS

Collaboration

Nov 29, 2018

62 pages

Published in:

JHEP 04 (2019) 046

Published: Apr 4, 2019

e-Print:

1811.12113 [hep-ex]

DOI:

10.1007/JHEP04(2019)046

Report number:

CERN-EP-2018-276

Experiments:

CERN-LHC-ATLAS

View in:

reference search157 citations

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Abstract: (Springer)

This paper presents measurements of

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\overline{t}

decay channels. Results are presented at particle level in the form of inclusive cross-sections of

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\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.

Note:

62 pages in total, author list starting page 46, 17 figures, 11 tables, submitted to JHEP. All figures, including auxiliary figures, are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2017-12

Hadron-Hadron scattering (experiments)
Heavy quark production
p p: colliding beams
top: pair production
Higgs particle: associated production
p p: scattering
Higgs particle: hadronic decay
heavy quark: jet
jet: bottom
bottom: multiple production

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