One-loop matching for quark dipole operators in a gradient-flow scheme

• DOI: 10.1007/jhep04(2022)050
• Publication Date: 2022-04-09T13:04:28Z
• Authors: Emanuele Mereghetti; Christopher J. Mo...; Matthew D. Rizik; Andrea Shindler; Peter Stoffer
• Keywords: Operator (biology); CP violation; Balanced flow; Lattice (music); Regularization

A bstract The quark chromoelectric dipole (qCEDM) operator is a CP-violating describing, at hadronic energies, beyond-the-standard-model contributions to the electric moment of particles with nonzero spin. In this paper we define renormalized operators in regularization-independent scheme using gradient flow, and perform matching one loop perturbation theory same lower dimension more familiar MS scheme. We also determine coefficients for chromo-magnetic (qCMDM), which contributes example matrix elements relevant CP-conserving kaon decays. calculation provides basis future lattice QCD computations qCEDM qCMDM operators.