Power corrections to electroweak boson production from threshold resummation

We study the power corrections for electroweak boson production that are implied by threshold resummation, which we have extended to massive particles produced at measured transverse momentum, pT, and rapidity. Power corrections in the resulting expressions arise from ambiguities in the low-scale behavior of the perturbative running coupling. Arguing for the relevance of the eikonal approximation, we show that such power corrections begin at order 1=p2T in full QCD, consistent with fixed-order, massive -gluon analysis. For large -N Mellin moments, the leading behavior is N2=p2T, which exponentiates along with the logarithms of threshold resummation.

Automated summary

We extend the study of power corrections for electroweak boson production using threshold resummation to account for massive particles produced at measured transverse momentum, pT, and rapidity. The power corrections in these expressions arise due to uncertainties in the low-scale behavior of the perturbative running coupling. By arguing for the relevance of the eikonal approximation, we demonstrate that such power corrections begin at order 1/p2T in full QCD, which is consistent with fixed-order, massive-gluon analysis. For large-N Mellin moments, the leading behavior is N2/p2T, which exponentiates along with the logarithms of threshold resummation.