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## Joint Theory Seminar: Peter Stoffer

Recent Papers of Peter Stoffer

Description: Joint Theory Seminar

Speaker: Peter Stoffer (UCSD)

Title: EFT below the electroweak scale and constraints from electric dipole moments

Host: Xiaochuan Lu

Room: 432

Abstract: Under the assumption that physics beyond the standard model consists of heavy particles well above the electroweak scale, its effects at lower energies can be described by an effective field theory, either SMEFT or HEFT above the electroweak scale. Below the electroweak scale, either theory should be mapped to a low-energy EFT (LEFT), where the heavy standard-model particles are integrated out. This is essentially the well-known Fermi theory of weak interactions. I will present the complete LEFT operator basis up to dimension six (which, surprisingly, so far was missing in the literature) as well as the calculation of the full one-loop RGEs.

At low energies, strong constraints on some LEFT Wilson coefficients come from electric dipole moments. In order to exploit the full power of neutron EDM measurements, the uncertainties of hadronic matrix elements should be reduced, e.g. with lattice calculations. In the second part of the talk, I will present ongoing work on matching calculations between the LEFT framework and a scheme that can be implemented on the lattice.Date: Monday, March 19, 2018 Time: 1:30pm-2:30pm Duration: 60 minutes Access: Public Created by: High-Energy Seminars Updated: Monday, February 26, 2018 3:49pm Send Reminder: Yes - 1 day 4 hours before event

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