Measurement of the top quark forward-backward production asymmetry and its dependence on event kinematic properties

Abstract

We present new measurements of the inclusive forward-backward ttbar production asymmetry, AFB, and its dependence on several properties of the ttbar system. The measurements are performed with the full Tevatron data set recorded with the CDF II detector during ppbar collisions at sqrt(s) = 1.96 TeV, corresponding to an integrated luminosity of 9.4 fb^(-1). We measure the asymmetry using the rapidity difference Delta-y=y_(t)-y_(tbar). Parton-level results are derived, yielding an inclusive asymmetry of 0.164+/-0.047 (stat + syst). We observe a linear dependence of AFB on the top-quark pair mass M(ttbar) and the rapidity difference |Delta-y| at detector and parton levels. Assuming the standard model, the probabilities to observe the measured values or larger for the detector-level dependencies are 7.4*10^(-3) and 2.2*10^(-3) for M(ttbar) and |Delta-y| respectively. Lastly, we study the dependence of the asymmetry on the transverse momentum of the ttbar system at the detector level. These results are consistent with previous lower-precision measurements and provide additional quantification of the functional dependencies of the asymmetry.

arXiv commentAccepted by Phys. Rev. D; Revision: Updated figure placement and author list, updates to text reflecting version accepted for publication

References in corpus (37)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• HERWIG 6.5: an event generator for Hadron Emission Reactions With Interfering Gluons (including supersymmetric processes)
• ALPGEN, a generator for hard multiparton processes in hadronic collisions
• Matching NLO QCD computations and parton shower simulations
• MadGraph/MadEvent v4: The New Web Generation
• A Positive-Weight Next-to-Leading-Order Monte Carlo for Heavy Flavour Hadroproduction
• An update on vector boson pair production at hadron colliders
• Measurement of the J/Psi Meson and b-Hadron Production Cross Sections in ppbar Collisions at sqrt s = 1960 GeV
• Percent level precision physics at the Tevatron: first genuine NNLO QCD corrections to q qbar -> t tbar + X
• SVD Approach to Data Unfolding
• Determination of the Jet Energy Scale at the Collider Detector at Fermilab
• Forward-backward asymmetry in top quark-antiquark production
• Measurement of the ttbar Production Cross Section in ppbar Collisions at sqrt{s}=1.96 TeV using Lepton + Jets Events with Secondary Vertex b-tagging
• Charge asymmetries of top quarks at hadron colliders revisited
• Top Quarks, Axigluons and Charge Asymmetries at Hadron Colliders
• The electroweak contribution to the top quark forward-backward asymmetry at the Tevatron
• Threshold Resummation for the Top Quark Charge Asymmetry
• Top Quark Mass Measurement Using the Template Method in the Lepton + Jets Channel at CDF II
• Measurement of the charge asymmetry in top quark pair production in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector
• First Measurement of the $\lowercase{\ttbar}$ Differential Cross Section $\lowercase{dσ/d}M_{\lowercase{t\overline{t}}}$ in $\lowercase{\ppbar}$ Collisions at $\sqrt{\lowercase{s}}=1.96$ TeV
• Forward-Backward Asymmetry of Top Quark Pair Production
• Hadronic top-quark pair production in association with a hard jet at next-to-leading order QCD: Phenomenological studies for the Tevatron and the LHC
• Standard Model Top Quark Asymmetry at the Fermilab Tevatron
• Electroweak Sudakov Corrections and the Top Quark Forward-Backward Asymmetry
• Inclusive and differential measurements of the t t-bar charge asymmetry in proton-proton collisions at sqrt(s) = 7 TeV
• Top quark pair production in association with a jet: QCD corrections and jet radiation in top quark decays
• First Measurement of the Ratio sigma_(t-tbar) / sigma_(Z/γ*->ll) and Precise Extraction of the t-tbar Cross Section
• A search for ttbar resonances in lepton+jets events with highly boosted top quarks collected in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
• QCD Coherence and the Top Quark Asymmetry
• Searching for Top Flavor Violating Resonances
• Search for resonant t t-bar production in lepton+jets events in pp collisions at sqrt(s) = 7 TeV
• Flipping t tbar asymmetries at the Tevatron and the LHC
• Collider-independent t tbar forward-backward asymmetries
• Top Quark Mass Measurement using mT2 in the Dilepton Channel at CDF
• A charged Z' to conciliate the apparent disagreement between top-antitop Tevatron forward-backward asymmetry and LHC charge asymmetry
• Forward Tevatron Tops and Backward LHC Tops with Associates

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