A representation of the different jet axes; Standard (STD), Soft Drop (SD), and Winner-Takes-All (WTA). The axis of the jet containing the \Dzero meson (shown in solid black) and all gluonic radiation is referred to as the Standard axis. The Winner-Takes-All axis is also determined from this initial jet sample but aligns with the hardest subjet at each clustering step. Grooming away softer radiation leaves a jet with the Soft Drop axis, defined by the remaining higher-momentum particles. Representations for the six \Raxis observables are shown in the right of the figure.