Measurement of color flow in t-tbar events from p-pbar collisions at sqrt(s)=1.96 TeV

Abstract

We present the first measurement of the color representation of the hadronically decaying W boson in t-tbar events, from 5.3 fb^-1 of integrated luminosity collected with the D0 experiment. A novel calorimeter-based vectorial variable, "jet pull," is used, sensitive to the color-flow structure of the final state. We find that the fraction of uncolored W bosons is 0.56 +- 0.42(stat+syst), in agreement with the standard model.

Submitted to Phys. Rev. Lett

References in corpus (3)

• PYTHIA 6.4 Physics and Manual
• Design and Implementation of the New D0 Level-1 Calorimeter Trigger
• Simultaneous measurement of the ratio B(t->Wb)/B(t->Wq) and the top quark pair production cross section with the D0 detector at sqrt(s)=1.96 TeV

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• An Optimal Observable for Color Singlet Identification
• Theory Predictions for the Pull Angle
• Top Quark Physics at the Tevatron
• Identifying the Quantum Properties of Hadronic Resonances using Machine Learning
• Tagging the Higgs boson decay to bottom quarks with colour-sensitive observables and the Lund jet plane