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

Abstrakt

We present the first measurement of the color representation of the hadronically decaying W boson in t (t) over bar 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.

Klíčová slova

• Color-flow
• W boson