Massive Boson Production at Small q_T in Soft-Collinear Effective Theory

Understand

We study the differential cross sections for electroweak gauge-boson and Higgs production at small and very small transverse-momentum q_T.

• Large logarithms are resummed using soft-collinear effective theory.
• The collinear anomaly generates a non-perturbative scale q_*, which protects the processes from receiving large long-distance hadronic contributions.
• A numerical comparison of our predictions with data on the transverse-momentum distribution in Z-boson production at the Tevatron and LHC is given.