# Renormalization of BSM operator contributing to the neutron electric dipole moment using gradient flow

#### Renormalization of BSM operator contributing to the neutron electric dipole moment using gradient flow

- Event time: 2:00pm until 3:00pm
- Event date: 23rd March 2022
- Speaker: Jangho Kim ( Goethe-Universität Frankfurt am Main)
- Location: Higgs Centre Seminar Room, Room 4305, James Clerk Maxwell Building (JCMB) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB

### Event details

The CP-violation based on the Standard Model doesn’t cover the amount needed for the observed baryon asymmetry. Via the electric dipole moment (EDM) study, we can investigate the CP-violation. The contribution to the neutron EDM coming from the SM is several order of magnitudes smaller than the current experimental bound. Therefore New CP-violation sources are required.

The strong CP-violating θ term and all the CP-violating effective operators can contribute to neutron EDM. To constrain all these contributions, we need to precisely determine the hadronic matrix elements of the corresponding renormalized operators. Lattice QCD is the unique tool for a non-perturbative approach to understand QCD by the first principle. I will introduce the current status for experiments and lattice calculations of a neutron EDM and discuss the renormalization of quark chromoelectric dipole moment operator with gradient flow method.

#### Event resources

### About Particle Physics Theory seminars

The Particle Physics Theory seminar is a weekly series of talks reflecting the diverse interests of the group. Topics include analytic and numerical calculations based on the Standard Model of elementary particle physics, theories exploring new physics, as well as more formal developments in gauge theories and gravity..