CERN Lattice Coffee

Electric dipole moments: a gateway to new physics

by Andrea Shindler (RWTH-University of Aachen)

Europe/Zurich
4/2-037 - TH meeting room (CERN)

4/2-037 - TH meeting room

CERN

18
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Description

The observed baryon asymmetry in the universe cannot be reconciled with the current form of the Standard Model (SM) of particle physics. The amount of CP-violation stemming from the Cabibbo-Kobayashi-Maskawa matrix is not sufficient to explain the observed matter-antimatter asymmetry. Historically, one of the initial systems investigated in the search for discrete symmetries violations was the electric dipole moment (EDM) of the neutron. Nowadays, it offers a unique opportunity to discover physics beyond the SM due to its significantly suppressed CP-violating contribution from the SM. 

After a brief summary of the current status for experimental searches of a neutron EDM, I delve into the various sources of CP-violation and the computational challenges associated with calculating the corresponding hadronic matrix elements using the lattice as a regulator. I then proceed detailing recent results obtained on the neutron EDM highlighting the primary theoretical and numerical tool employed: the gradient flow. By leveraging this approach, I showcase significant progress made in understanding the neutron EDM. I conclude outlining the near-term objectives, addressing the challenges lying ahead, and providing an optimistic outlook for the future of neutron EDM research.

Videoconference
Lattice seminars
Zoom Meeting ID
68098777127
Host
Elena Gianolio
Alternative hosts
Matteo Di Carlo, Tobias Tsang, Pascal Pignereau, Mattia Dallabrida, Felix Benjamin Erben, Andreas Juttner, Simon Kuberski
Passcode
11900596
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