Effective field theory interpretation of lepton magnetic and electric dipole moments

Understand

We perform a model-independent analysis of the magnetic and electric dipole moments of the muon and electron.

• We give expressions for the dipole moments in terms of operator coefficients of the low-energy effective field theory (LEFT) and the Standard Model effective field theory (SMEFT).
• We use one-loop renormalization group improved perturbation theory, including the one-loop matching from SMEFT onto LEFT, and one-loop lepton matrix elements of the effective-theory operators.
• Semileptonic four-fermion operators involving light quarks give sizable non-perturbative contributions to the dipole moments, which are included in our analysis.