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Dresden 2013 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 28: Fundamentale Symmetrien

HK 28.6: Talk

Tuesday, March 5, 2013, 15:45–16:00, HSZ-103

Experimental search for the electric dipole moment (EDM) of 129Xe in 3He/129Xe clock-comparison experiments — •Anja Scharth1, Werner Heil1, Sergei Karpuk1, Yury Sobolev1, Kathlynne Tullney1, Fabian Allmendinger2, Ulrich Schmidt2, Martin Burghoff3, Wolfgang Kilian3, Allard Schnabel3, Frank Seifert3, Lutz Trahms3, Olivier Grasdijk4, Klaus Jungmann4, and Lorenz Willman41Institut für Physik, Universität Mainz — 2Physikalisches Institut, Universität Heidelberg — 3PTB Berlin — 4University of Groningen

Permanent atomic EDMs would imply a breakdown of both parity and time reversal symmetry and therefore lead to a violation of CP symmetry. Thus searches for the EDM of 129Xe are an unambiguous method to test physics beyond the standard model. Our approach is to use co-located 3He/129Xe spin samples and to measure their coherent spin-precession over extended periods of ∼ 1 day, typically. Based on our experience with measurements on Lorentz-invariance [1,2], we intend to reach a measurement sensitivity that will improve the present upper limit dXe = 3 · 10−27 e · cm significantly. Phase I of this experiment will be performed in the magnetically shielded room BMSR-2 of the PTB Berlin using very sensitive SQUID gradiometers as magnetic flux detectors and electric fields of ≈2 kV/cm. The experimental setup and current status of work will be presented.

[1] C.Gemmel et al., Eur. Phys. J D 47, 303 (2010)

[2] C.Gemmel et al., Phys. Rev D 82, 111901(R) (2010)

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