Measurement of the cross section for $\text{t}\bar{\text{t}}$ production with additional jets and b jets in pp collisions at $\sqrt{s}=$ 13 TeV

Abstract

Measurements of the cross section for the production of top quark pairs in association with a pair of jets from bottom quarks (${\sigma }_{\mathrm{t}\bar{\mathrm{t}}\mathrm{b}\bar{\mathrm{b}}}$) and in association with a pair of jets from quarks of any flavor or gluons (${\sigma }_{\mathrm{t}\bar{\mathrm{t}}\mathrm{jj}}$) and their ratio are presented. The data were collected in proton-proton collisions at a center-of-mass energy of 13 TeV by the CMS experiment at the LHC in 2016 and correspond to an integrated luminosity of 35.9 fb${}^{-1}$. The measurements are performed in a fiducial phase space and extrapolated to the full phase space, separately in the dilepton and lepton+jets channels, where lepton corresponds to either an electron or a muon. The results for the dilepton and lepton+jets channels, respectively, are ${\sigma }_{\mathrm{t}\bar{\mathrm{t}}\mathrm{jj}}$ = 2.36 $\pm$ 0.02 (stat) $\pm$ 0.20 (syst) pb and 31.0 $\pm$ 0.2 (stat) $\pm$ 2.9 (syst) pb, and for the cross section ratio 0.017 $\pm$ 0.001 (stat) $\pm$ 0.001 (syst) and 0.020 $\pm$ 0.001 (stat) $\pm$ 0.001 (syst). The values of ${\sigma }_{\mathrm{t}\bar{\mathrm{t}}\mathrm{b}\bar{\mathrm{b}}}$ are determined from the product of the ${\sigma }_{\mathrm{t}\bar{\mathrm{t}}\mathrm{jj}}$ and the cross section ratio, obtaining, respectively, 0.040 $\pm$ 0.002 (stat) $\pm$ 0.005 (syst) pb and 0.62 $\pm$ 0.03 (stat) $\pm$ 0.07 (syst) pb. These measurements are the most precise to date and are consistent, within the uncertainties, with the standard model expectations obtained using a matrix element calculation at next-to-leading order in quantum chromodynamics matched to a parton shower.

arXiv commentReplaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/TOP-18-002 (CMS Public Pages)

References in corpus (62)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• The anti-k_t jet clustering algorithm
• An Introduction to PYTHIA 8.2
• FastJet user manual
• A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
• A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Parton distributions for the LHC Run II
• Herwig++ Physics and Manual
• PDF4LHC recommendations for LHC Run II
• New parton distribution functions from a global analysis of quantum chromodynamics
• The total top quark pair production cross-section at hadron colliders through O(alpha_S^4)
• Top++: a program for the calculation of the top-pair cross-section at hadron colliders
• Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions
• Particle-flow reconstruction and global event description with the CMS detector
• Tuning PYTHIA 8.1: the Monash 2013 Tune
• Vector boson pair production at the LHC
• The CMS trigger system
• Single-top Wt-channel production matched with parton showers using the POWHEG method
• Merging meets matching in MC@NLO
• Automatic spin-entangled decays of heavy resonances in Monte Carlo simulations
• Single-top hadroproduction in association with a W boson
• The Catchment Area of Jets
• Percent level precision physics at the Tevatron: first genuine NNLO QCD corrections to q qbar -> t tbar + X
• Top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation
• MCFM for the Tevatron and the LHC
• Jet energy scale and resolution in the CMS experiment in pp collisions at 8 TeV
• Identification of heavy-flavour jets with the CMS detector in pp collisions at 13 TeV
• NNLO corrections to top-pair production at hadron colliders: the all-fermionic scattering channels
• Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at sqrt(s) = 8 TeV
• NNLO corrections to top pair production at hadron colliders: the quark-gluon reaction
• Performance of the CMS muon detector and muon reconstruction with proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Hadronic top-quark pair production with NNLL threshold resummation
• ZZ production at hadron colliders in NNLO QCD
• Combining QCD and electroweak corrections to dilepton production in FEWZ
• Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector
• String Formation Beyond Leading Colour
• $W^{+}{W}^{-}$ production at hadron colliders in NNLO QCD
• Performance of missing transverse momentum reconstruction in proton-proton collisions at $\sqrt{s}=$ 13 TeV using the CMS detector
• Observation of $\mathrm{t}\overline{\mathrm{t}}$H production
• Measurements of properties of the Higgs boson decaying into the four-lepton final state in pp collisions at sqrt(s) = 13 TeV
• Measurements of Higgs boson properties in the diphoton decay channel with 36 fb${}^{-1}$ of $pp$ collision data at $\sqrt{s}=13$ TeV with the ATLAS detector
• Top-pair production and decay at NLO matched with parton showers
• Direct Measurement of the Top Quark Mass at D0
• Effects of color reconnection on $t\bar{t}$ final states at the LHC
• Constraining MPI models using sigma_effective and recent Tevatron and LHC Underlying Event data
• NLO QCD corrections to top anti-top bottom anti-bottom production at the LHC: 1. quark-antiquark annihilation
• Measurement of the Higgs boson mass in the $H\to Z{Z}^{\ast }\to 4\ell$ and $H\to \gamma \gamma$ channels with $\sqrt{s}=13$ TeV $pp$ collisions using the ATLAS detector
• Search for the Standard Model Higgs boson produced in association with top quarks and decaying into a $b\bar{b}$ pair in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• Measurements of properties of the Higgs boson decaying to a W boson pair in pp collisions at $\sqrt{s}=$ 13 TeV
• Measurements of Higgs boson properties in the diphoton decay channel in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Hadronic top-quark pair production in association with two jets at Next-to-Leading Order QCD
• New NLOPS predictions for $\mathbf{t}\bar{\mathbf{t}}+\mathbf{b}$-jet production at the LHC
• Measurement of differential cross sections for the production of top quark pairs and of additional jets in lepton+jets events from pp collisions at $\sqrt{s}=$ 13 TeV
• Measurements of fiducial and differential cross-sections of $t\bar{t}$ production with additional heavy-flavour jets in proton-proton collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• Measurements of fiducial cross-sections for $t\bar{t}$ production with one or two additional $b$-jets in $pp$ collisions at $\sqrt{s}$ = 8 TeV using the ATLAS detector
• In-medium covariant propagator of baryons under a strong magnetic field: effect of the intrinsic magnetic moments
• Measurement of the $\mathrm{t}\bar{\mathrm{t}}\mathrm{b}\bar{\mathrm{b}}$ production cross section in the all-jet final state in pp collisions at $\sqrt{s}=$ 13 TeV
• Measurement of t t-bar production with additional jet activity, including b quark jets, in the dilepton channel using pp collisions at sqrt(s) = 8 TeV
• Measurements of tt-bar cross sections in association with b jets and inclusive jets and their ratio using dilepton final states in pp collisions at sqrt(s) = 13 TeV
• Measurement of the cross section ratio sigma(t t-bar b b-bar) / sigma(t t-bar jj) in pp collisions at sqrt(s) = 8 TeV
• On the ratio of ttbb and ttjj cross sections at the CERN Large Hadron Collider

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• Full NLO QCD corrections to off-shell ttbb production
• Measurements of differential cross-sections in top-quark pair events with a high transverse momentum top quark and limits on beyond the Standard Model contributions to top-quark pair production with the ATLAS detector at $\sqrt{s}=13$ TeV
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• $t\bar{t}b\bar{b}$ at the LHC: On the size of off-shell effects and prompt $b$-jet identification
• A study of additional jet activity in top quark pair production and decay at the LHC
• Canonical differential equations for the elliptic two-loop five-point integral family relevant to $t\bar{t}+$jet production at leading colour
• Flavour-changing neutral scalar interactions of the top quark
• Search for a light charged Higgs boson in $t\to H^{\pm }b$ decays, with $H^{\pm }\to cs$, in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for new physics using effective field theory in 13 TeV pp collision events that contain a top quark pair and a boosted Z or Higgs boson
• Five-flavour scheme predictions for $t\bar{t}b\bar{b}$ at next-to-leading order accuracy
• Search for a new pseudoscalar decaying into a pair of bottom and antibottom quarks in top-associated production in $\sqrt{s}$=13 TeV proton-proton collisions with the ATLAS detector
• Measurements of the Cross-Section for the $t\bar{t}$ + Heavy-Flavor Production at the LHC
• One-loop amplitudes for $t\bar{t}j$ and $t\bar{t}\gamma$ productions at the LHC through $\mathcal{O}({\epsilon }^2)$