Séminaires et colloques

[Theory seminar] Lepton Electric and Magnetic Moments in Effective Field Theories

par Dipan Sengupta (Adelaine U.)

Europe/Paris
salle de reunion 345 (LPSC)

salle de reunion 345

LPSC

Description

I will talk about a model-independent analysis of electric and magnetic dipole moments.  I will 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.