Speaker
Description
One of the prevailing enigmas in contemporary physics is the observed disparity between the abundance of matter and antimatter in the universe, posing a fundamental challenge to the principles of the Standard Model of particle physics.
Within the LSym experiment we plan to compare the fundamental properties, specifically the charge-to-mass ratios and the g-factors, of the electron and the positron in a cryogenic Penning trap to 14 digits precision and thereby performing a highly sensitive test of matter-antimatter symmetry in the lepton sector [1]. This precision can be achieved by simultaneously trapping both the particles in the same trap. Once the positron is cooled to the ground state of motion in a millikelvin-cooled Penning trap that forms a custom-tailored millimeter-wave cavity, we can measure the coherent difference of the spin precession frequencies of the matter and antimatter particles [2].
In the contribution, the experimental setup, techniques and challenges will be presented.
References:
[1] E. Widmann et al., Hyperfine Interact 240, 5 (2019)
[2] Tim Sailer et al., Nature 606, 479–483 (2022)
