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

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Article number092002
<mark>Journal publication date</mark>10/05/2011
<mark>Journal</mark>Physical Review D
Issue number9
Number of pages7
Publication StatusPublished
<mark>Original language</mark>English


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.

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© 2011 American Physical Society Submitted to Phys. Rev. Lett