Dependence of the $t\bar{t}$ production cross section on the transverse momentum of the top quark

Abstract

We present a measurement of the differential cross section for $t\bar{t}$ events produced in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV as a function of the transverse momentum ($p_T$) of the top quark. The selected events contain a high-$p_T$ lepton ($\ell$), four or more jets, and a large imbalance in $p_T$, and correspond to 1 fb${}^{-1}$ of integrated luminosity recorded with the D0 detector. Each event must have at least one candidate for a $b$ jet. Objects in the event are associated through a constrained kinematic fit to the $t\bar{t}\to WbW\bar{b}\to \ell \nu bq{\bar{q}}^{\prime }\bar{b}$ process. Results from next-to-leading-order perturbative QCD calculations agree with the measured differential cross section. Comparisons are also provided to predictions from Monte Carlo event generators using QCD calculations at different levels of precision.

8 pages, 6 figures, 4 tables, updated to reflect the published version

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• Parton distributions for the LHC
• The theoretical top quark cross section at the Tevatron and the LHC
• b-Jet Identification in the D0 Experiment
• Combination of ttbar cross section measurements and constraints on the mass of the top quark and its decays into charged Higgs bosons
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Cited by in corpus (25)

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• Combination of the top-quark mass measurements from the Tevatron collider
• Hadronic top-quark pair-production with one jet and parton showering
• NNLO QCD predictions for fully-differential top-quark pair production at the Tevatron
• RG-improved single-particle inclusive cross sections and forward-backward asymmetry in $t\bar{t}$ production at hadron colliders
• The top quark rapidity distribution and forward-backward asymmetry
• Two-Loop Leading Color Corrections to Heavy-Quark Pair Production in the Gluon Fusion Channel
• NNNLO soft-gluon corrections for the top-quark $p_T$ and rapidity distributions
• Implications of the CDF t\bar{t} Forward-Backward Asymmetry for Boosted Top Physics
• Measurement of differential $t\bar{t}$ production cross sections in $p\bar{p}$ collisions
• Top-quark production and QCD
• Measurement of the jet mass in highly boosted t t-bar events from pp collisions at sqrt(s) = 8 TeV
• Precision measurements of the top quark mass from the Tevatron in the pre-LHC era
• Top Quark Physics at the Tevatron
• CHICOM: A code of tests for comparing unweighted and weighted histograms and two weighted histograms
• Azimuthal decorrelation in $t\bar{t}$ production at hadron colliders
• Single top and top pair production
• Phenomenology of kt-factorization for inclusive top quark pair production at hadron colliders
• Studies of high-transverse momentum jet substructure and top quarks produced in 1.96 TeV proton-antiproton collisions
• Theoretical results for top quark production
• Chi-square goodness of fit tests for weighted histograms. Review and improvements
• Top Quark Physics at the Tevatron
• Measurements of the Top Quark Pair-Production Cross Section
• Review of recent measurements in the top quark sector at the Tevatron
• Top quark transverse momentum and rapidity distributions