Dresden 2013 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 28: Fundamentale Symmetrien

HK 28.4: Vortrag

Dienstag, 5. März 2013, 15:15–15:30, HSZ-103

A novel approach to measure the electric dipole moment of ¹²⁹Xenon — •Florian Kuchler, Peter Fierlinger, and David Wurm — Excellence Cluster "Universe", Technische Universität München, Boltzmannstr. 2, 85748 Garching

Permanent electric dipole moments (EDM) are promising systems to find new CP violation. The properties of the diamagnetic atom ¹²⁹Xe make it a particularly interesting candidate for an EDM search, as it enables new experimental strategies. Although the current experimental limit of d_Xe < 4.0 · 10⁻²⁷ ecm is many orders of magnitude higher than the Standard Model (SM) prediction, theories beyond the SM usually require larger EDMs.

Our experiment is based on microscopic hyper-polarized liquid xenon droplets, placed in a low-field NMR setup. Employing superconducting pick-up coils and highly sensitive LTc-SQUIDs for detection of the xenon spin precession we aim to increase the sensitivity to an EDM of ¹²⁹Xe by three orders of magnitude.

Implementation of rotating electric fields enables a conceptually new EDM measurement technique, allowing thorough investigation of systematic effects. Still, a Ramsey-type spin precession experiment with static electric field can be realized at similar sensitivity within the same setup.

The talk will give both an overview of the xenon EDM experiment and an update on the experimental status.