Electroweak and QCD Corrections to $Z$ and $W$ pole observables in the SMEFT

Abstract

We compute the next-to-leading order QCD and electroweak corrections to $Z$ and $W$ pole observables using the dimension-6 Standard Model effective field theory and present numerical results that can easily be included in global fitting programs. Limits on SMEFT coefficient functions are presented at leading order and at next-to-leading order under several assumptions.

Comments: 28 pages, 2 figures, V4: Minor error in real contributions corrected with very small numerical impact. Updated auxiliary file posted