Karlsruhe 2011 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 45: CP-Verletzung und Mischungswinkel I
T 45.4: Vortrag
Dienstag, 29. März 2011, 17:30–17:45, 30.36: 011
A novel approach to measure the electric dipole moment of 129Xenon — •Florian Kuchler1, Ralf DeVoe2, Wolfhardt Feldmeier1, Peter Fierlinger1, Klaus Kirch3, Michael Marino1, Gerd Petzoldt1, Felix Rosenau1, and Bernd Taubenheim1 — 1Excellence Cluster Universe, Technische Universität München, Boltzmannstr. 2, 85748 Garching, Germany — 2Stanford University, Stanford, CA 94305, USA — 3Paul Scherrer Institut, 5232 Villingen-PSI, Switzerland
Permanent electric dipole moments (EDM) are promising systems to find new CP violation. The properties of the diamagnetic atom 129-Xe make it a particularly interesting candidate for an EDM search, as it enables new experimental strategies. Although the current experimental limit of dXe<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. 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. Employing superconducting pick-up coils and highly sensitive LTc-SQUIDs, a large array of independent measurements can be performed simultaneously with different field configurations. Detailed Monte-Carlo simulations were carried out confirming our sensitivity goals (<10−30 ecm) and also showing interesting other effects.