Speaker
Description
We are interested in probing CP Violation (CPV) in photon-photon interactions. Such interactions, effectively described by operators of the form $FFF\tilde{F}$, have yet to be directly constrained experimentally, and could point to new sources of CPV beyond the Standard Model (SM). One possible mediator of CP-violating photon-photon interactions could be the relaxion, which is theoretically motivated within a dynamical solution to the Hierarchy problem, and is expected to interact with the SM both through axion-like and scalar Higgs-portal couplings. We propose a method for isolating CP-violating non-linear electrodynamics using Superconducting Radiofrequency (SRF) cavities, thus eliminating the main SM background, related to the CP-conserving Euler-Heisenberg Lagrangian.
