Effective electroweak Hamiltonian in the gradient-flow formalism

Abstract

The effective electroweak Hamiltonian in the gradient-flow formalism is constructed for the current-current operators through next-to-next-to-leading order QCD. The results are presented for two common choices of the operator basis. This paves the way for a consistent matching of perturbatively evaluated Wilson coefficients and non-perturbative matrix elements evaluated by lattice simulations.

Comments: 6 pages, 1 figure, 1 ancillary file. v2: minor clarifications, matches published version