angularly ordered parton showers by dividing the shower into several steps [@Nason:2004rx]. The hardest emission in the shower is generated first using the POWHEG Sudakov form factor and the value of the angular evolution variable corresponding to this emission is determined. An angularly ordered shower, running from the shower starting scale down to the scale of the hardest emission, is then generated. This *truncated* parton shower simulates coherent soft wide-angle radiation. The hardest emission is then inserted and the shower continues until the IR cut-off of the evolution variable is reached. Finally, in both stages of the parton shower, emissions generated by the shower are discarded if they have higher transverse momentum than the emission generated using the POWHEG Sudakov form factor.

Top Quark Decays {#sec:TopQuark}
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In this section, we describe our implementation of the POWHEG formalism for the example of a top quark decaying to a $W$ boson and a bottom quark. To implement the full POWHEG correction to this decay, the Born configuration must be generated according to Eq. \[eq:Bbar\] and the hardest emission in the parton shower simulated using Eq. \[eq:POSudakov2\]. However, in this work we consider only the effect of the POWHEG correction on the 