Bulletin of the American Physical Society
APS April Meeting 2019
Volume 64, Number 3
Saturday–Tuesday, April 13–16, 2019; Denver, Colorado
Session D07: Magnetic Resonance Tests of Fundamental Physics
3:30 PM–5:18 PM,
Saturday, April 13, 2019
Sheraton
Room: Governor's Square 16
Sponsoring
Units:
GPMFC DAMOP
Chair: Alexander Sushkov, Boston University
Abstract: D07.00003 : Limits on the permanent electric dipole moment of 129Xe*
4:42 PM–5:18 PM
View Presentation Abstract
Presenter:
Lorenz Willmann
(VSI, University of Groningen, The Netherlands)
Author:
Lorenz Willmann
(VSI, University of Groningen, The Netherlands)
Collaboration:
MIXed: F.Allmendinger, I.Engin, J.O.Grasdijk, W.Heil, K.Jungmann, S.Karpuk, H-J.Krause, B.Niederländer, A.Offenhäusser, M.Repetto, U.Schmidt, L.Willmann and S.Zimmer U. Heidelberg, FZ Jülich, U. Groningen, U. Mainz
Any precise value of a CP-violating electric dipole moment (EDM) on a fundamental particle has large impact on the Standard Model (SM). In case its value is larger than predicted by SM it would be direct evidence of New Physics. This has lead to a considerable number of experiments on particles, atoms, molecules and condensed matter systems. These approaches differ substantially in their intrinsic sensitivity and associated systematic uncertainties. We focus on conceptually different experimental implementation with an emphasis on the differences in sensitivity and characteristic time scales of the experiments. One approach exploits molecules such as barium monofluoride (BaF) which offer large intrinsic enhancement factors for a potential electron EDM and has typical coherence times of several 10ms. This experiment is currently set up at the University of Groningen. A different approach is utilizing spin precession of polarized noble gases, which is sensitive in particular to nuclear EDMs. Here coherence times are of order 103 s.
The MIXed collaboration (University of Heidelberg, GER, University of Mainz, GER, FZ Jülich, GER and University of Groningen, NL) has performed a measurement campaign on a gas mixture of spin-polarized 3He (co-magnetometer) and 129Xe in a 10cm diameter spherical glass cell. The experiment is performed in a magnetically shielded room at Forschungszentrum Jülich and it uses a guiding magnetic field of 400nT. The preliminary results on the EDM in the 129Xe of these measurements will be presented which exceed the existing present limits.
*The MIXed experiment acknowledges funding from the German DFG, the Carl-Zeiss-Stiftung, the PRISMA cluster of excellence at the Mainz University, the Helmholtzzentrum FZ Jülich, and the programme 'Broken Mirrors' of the Dutch FOM/NWO.
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