Measurement of color flow in t-tbar events from p-pbar collisions at sqrt(s)=1.96 TeV
arXiv:1101.0648 · doi:10.1103/PhysRevD.83.092002
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