  The differential p_T spectrum for vector boson production is computed at
next-to-leading fixed order and including the resummation of threshold
logarithms at next-to-next-to-leading logarithmic accuracy. A comparison is
made to ATLAS data on direct photon and W production at high transverse
momentum p_T, finding excellent agreement. The resummation is achieved by
factorizing contributions associated with different scales using Soft-Collinear
Effective Theory. Each part is then calculated perturbatively and the
individual contributions are combined using renormalization group methods. A
key advantage of the effective theory framework is that it indicates a set of
natural scale choices, in contrast to the fixed-order calculation. Resummation
of logarithms of ratios of these scales leads to better agreement with data and
reduced theoretical uncertainties.
